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https://github.com/reactos/reactos.git
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cancel changes from david welch : write operations dangerous
remove allocations, use directly buffers svn path=/trunk/; revision=159
This commit is contained in:
jean
parent
b0cbc91ce1
commit
523aba9a89
1 changed files with 153 additions and 171 deletions
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@ -1,171 +1,153 @@
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/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: services/fs/vfat/blockdev.c
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* PURPOSE: Temporary sector reading support
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* PROGRAMMER: David Welch (welch@mcmail.com)
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* UPDATE HISTORY:
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*/
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/* INCLUDES *****************************************************************/
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#include <ddk/ntddk.h>
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#include <internal/string.h>
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#include <wstring.h>
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#define NDEBUG
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#include <internal/debug.h>
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#include "vfat.h"
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/* FUNCTIONS ***************************************************************/
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BOOLEAN VFATReadSectors(IN PDEVICE_OBJECT pDeviceObject,
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IN ULONG DiskSector,
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IN ULONG SectorCount,
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IN UCHAR* Buffer)
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{
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LARGE_INTEGER sectorNumber;
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PIRP irp;
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IO_STATUS_BLOCK ioStatus;
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KEVENT event;
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NTSTATUS status;
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ULONG sectorSize;
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SET_LARGE_INTEGER_LOW_PART(sectorNumber, DiskSector << 9);
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SET_LARGE_INTEGER_HIGH_PART(sectorNumber, DiskSector >> 23);
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KeInitializeEvent(&event, NotificationEvent, FALSE);
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sectorSize = BLOCKSIZE * SectorCount;
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/* FIXME: this routine does not need to alloc mem and copy */
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DPRINT("VFATReadSector(pDeviceObject %x, DiskSector %d, Buffer %x)\n",
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pDeviceObject,
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DiskSector,
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Buffer);
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DPRINT("sectorNumber %08lx:%08lx sectorSize %ld\n",
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(unsigned long int)GET_LARGE_INTEGER_HIGH_PART(sectorNumber),
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(unsigned long int)GET_LARGE_INTEGER_LOW_PART(sectorNumber),
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sectorSize);
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DPRINT("Building synchronous FSD Request...\n");
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irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
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pDeviceObject,
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Buffer,
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sectorSize,
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§orNumber,
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&event,
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&ioStatus );
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if (!irp) {
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DbgPrint("READ failed!!!\n");
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return FALSE;
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}
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DPRINT("Calling IO Driver...\n");
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status = IoCallDriver(pDeviceObject,
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irp);
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DPRINT("Waiting for IO Operation...\n");
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if (status == STATUS_PENDING) {
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KeWaitForSingleObject(&event,
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Suspended,
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KernelMode,
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FALSE,
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NULL);
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DPRINT("Getting IO Status...\n");
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status = ioStatus.Status;
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}
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if (!NT_SUCCESS(status)) {
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DbgPrint("IO failed!!! VFATREadSectors : Error code: %x\n", status);
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DbgPrint("(pDeviceObject %x, DiskSector %x, Buffer %x, offset 0x%x%x)\n",
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pDeviceObject,
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DiskSector,
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Buffer,
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GET_LARGE_INTEGER_HIGH_PART(sectorNumber),
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GET_LARGE_INTEGER_LOW_PART(sectorNumber));
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return FALSE;
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}
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DPRINT("Copying memory...\n");
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DPRINT("Block request succeeded\n");
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return TRUE;
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}
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BOOLEAN VFATWriteSectors(IN PDEVICE_OBJECT pDeviceObject,
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IN ULONG DiskSector,
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IN ULONG SectorCount,
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IN UCHAR* Buffer)
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{
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LARGE_INTEGER sectorNumber;
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PIRP irp;
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IO_STATUS_BLOCK ioStatus;
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KEVENT event;
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NTSTATUS status;
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ULONG sectorSize;
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PULONG mbr;
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DPRINT("VFATWriteSector(pDeviceObject %x, DiskSector %d, Buffer %x)\n",
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pDeviceObject,DiskSector,Buffer);
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SET_LARGE_INTEGER_LOW_PART(sectorNumber, DiskSector << 9);
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SET_LARGE_INTEGER_HIGH_PART(sectorNumber, DiskSector >> 23);
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KeInitializeEvent(&event, NotificationEvent, FALSE);
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sectorSize = BLOCKSIZE*SectorCount;
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mbr = ExAllocatePool(NonPagedPool, sectorSize);
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if (!mbr) {
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return FALSE;
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}
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DPRINT("Building synchronous FSD Request...\n");
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irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
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pDeviceObject,
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mbr,
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sectorSize,
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§orNumber,
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&event,
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&ioStatus );
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if (!irp) {
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DbgPrint("WRITE failed!!!\n");
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ExFreePool(mbr);
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return FALSE;
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}
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DPRINT("Calling IO Driver...\n");
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status = IoCallDriver(pDeviceObject,
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irp);
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DPRINT("Waiting for IO Operation...\n");
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if (status == STATUS_PENDING) {
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KeWaitForSingleObject(&event,
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Suspended,
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KernelMode,
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FALSE,
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NULL);
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DPRINT("Getting IO Status...\n");
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status = ioStatus.Status;
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}
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if (!NT_SUCCESS(status)) {
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DbgPrint("IO failed!!! VFATWriteSectors : Error code: %x\n", status);
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ExFreePool(mbr);
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return FALSE;
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}
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DPRINT("Copying memory...\n");
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RtlCopyMemory(Buffer,mbr,sectorSize);
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ExFreePool(mbr);
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DPRINT("Block request succeeded\n");
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return TRUE;
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}
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/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: services/fs/vfat/blockdev.c
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* PURPOSE: Temporary sector reading support
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* PROGRAMMER: David Welch (welch@mcmail.com)
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* UPDATE HISTORY:
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*/
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/* INCLUDES *****************************************************************/
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#include <ddk/ntddk.h>
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#include <internal/string.h>
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#include <wstring.h>
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#define NDEBUG
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#include <internal/debug.h>
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#include "vfat.h"
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/* FUNCTIONS ***************************************************************/
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BOOLEAN VFATReadSectors(IN PDEVICE_OBJECT pDeviceObject,
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IN ULONG DiskSector,
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IN ULONG SectorCount,
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IN UCHAR* Buffer)
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{
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LARGE_INTEGER sectorNumber;
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PIRP irp;
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IO_STATUS_BLOCK ioStatus;
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KEVENT event;
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NTSTATUS status;
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ULONG sectorSize;
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SET_LARGE_INTEGER_LOW_PART(sectorNumber, DiskSector << 9);
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SET_LARGE_INTEGER_HIGH_PART(sectorNumber, DiskSector >> 23);
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KeInitializeEvent(&event, NotificationEvent, FALSE);
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sectorSize = BLOCKSIZE * SectorCount;
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DPRINT("VFATReadSector(pDeviceObject %x, DiskSector %d, Buffer %x)\n",
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pDeviceObject,
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DiskSector,
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Buffer);
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DPRINT("sectorNumber %08lx:%08lx sectorSize %ld\n",
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(unsigned long int)GET_LARGE_INTEGER_HIGH_PART(sectorNumber),
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(unsigned long int)GET_LARGE_INTEGER_LOW_PART(sectorNumber),
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sectorSize);
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DPRINT("Building synchronous FSD Request...\n");
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irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
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pDeviceObject,
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Buffer,
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sectorSize,
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§orNumber,
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&event,
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&ioStatus );
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if (!irp) {
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DbgPrint("READ failed!!!\n");
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return FALSE;
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}
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DPRINT("Calling IO Driver...\n");
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status = IoCallDriver(pDeviceObject,
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irp);
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DPRINT("Waiting for IO Operation...\n");
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if (status == STATUS_PENDING) {
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KeWaitForSingleObject(&event,
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Suspended,
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KernelMode,
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FALSE,
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NULL);
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DPRINT("Getting IO Status...\n");
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status = ioStatus.Status;
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}
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if (!NT_SUCCESS(status)) {
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DbgPrint("IO failed!!! VFATREadSectors : Error code: %x\n", status);
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DbgPrint("(pDeviceObject %x, DiskSector %x, Buffer %x, offset 0x%x%x)\n",
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pDeviceObject,
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DiskSector,
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Buffer,
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GET_LARGE_INTEGER_HIGH_PART(sectorNumber),
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GET_LARGE_INTEGER_LOW_PART(sectorNumber));
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return FALSE;
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}
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DPRINT("Block request succeeded\n");
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return TRUE;
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}
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BOOLEAN VFATWriteSectors(IN PDEVICE_OBJECT pDeviceObject,
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IN ULONG DiskSector,
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IN ULONG SectorCount,
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IN UCHAR* Buffer)
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{
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LARGE_INTEGER sectorNumber;
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PIRP irp;
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IO_STATUS_BLOCK ioStatus;
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KEVENT event;
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NTSTATUS status;
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ULONG sectorSize;
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DPRINT("VFATWriteSector(pDeviceObject %x, DiskSector %d, Buffer %x)\n",
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pDeviceObject,DiskSector,Buffer);
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SET_LARGE_INTEGER_LOW_PART(sectorNumber, DiskSector << 9);
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SET_LARGE_INTEGER_HIGH_PART(sectorNumber, DiskSector >> 23);
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KeInitializeEvent(&event, NotificationEvent, FALSE);
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sectorSize = BLOCKSIZE*SectorCount;
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DPRINT("Building synchronous FSD Request...\n");
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irp = IoBuildSynchronousFsdRequest(IRP_MJ_WRITE,
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pDeviceObject,
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Buffer,
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sectorSize,
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§orNumber,
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&event,
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&ioStatus );
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if (!irp) {
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DbgPrint("WRITE failed!!!\n");
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return FALSE;
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}
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DPRINT("Calling IO Driver...\n");
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status = IoCallDriver(pDeviceObject,
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irp);
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DPRINT("Waiting for IO Operation...\n");
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if (status == STATUS_PENDING) {
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KeWaitForSingleObject(&event,
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Suspended,
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KernelMode,
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FALSE,
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NULL);
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DPRINT("Getting IO Status...\n");
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status = ioStatus.Status;
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}
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if (!NT_SUCCESS(status)) {
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DbgPrint("IO failed!!! VFATWriteSectors : Error code: %x\n", status);
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return FALSE;
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}
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DPRINT("Block request succeeded\n");
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return TRUE;
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}
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