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Fixed wrong MBR declaration.

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svn path=/trunk/; revision=4219
This commit is contained in:
Eric Kohl 2003-03-01 00:00:32 +00:00
parent 95cee3fcfb
commit 87364d1ef4
1 changed files with 17 additions and 15 deletions
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32
reactos/ntoskrnl/io/xhaldrv.c
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@ -1,4 +1,4 @@
/* $Id: xhaldrv.c,v 1.26 2003/02/26 14:12:43 ekohl Exp $
/* $Id: xhaldrv.c,v 1.27 2003/03/01 00:00:32 ekohl Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -50,9 +50,7 @@ typedef struct _PARTITION_TABLE
typedef struct _MBR
{
UCHAR MbrBootCode[442]; /* 0x000 */
ULONG Signature; /* 0x1B8 */
USHORT Unused; /* 0x1BC */
UCHAR MbrBootCode[446]; /* 0x000 */
PARTITION Partition[PARTITION_TBL_SIZE]; /* 0x1BE */
USHORT Magic; /* 0x1FE */
} PACKED MBR, *PMBR;
@ -178,6 +176,7 @@ xHalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
KEVENT Event;
IO_STATUS_BLOCK StatusBlock;
LARGE_INTEGER Offset;
PUCHAR Sector;
PULONG Shift;
PMBR Mbr;
PIRP Irp;
@ -191,9 +190,9 @@ xHalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
if (SectorSize > 4096)
SectorSize = 4096;
Mbr = (PMBR)ExAllocatePool(PagedPool,
SectorSize);
if (Mbr == NULL)
Sector = (PUCHAR)ExAllocatePool(PagedPool,
SectorSize);
if (Sector == NULL)
return;
KeInitializeEvent(&Event,
@ -204,7 +203,7 @@ xHalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
Offset.QuadPart = 0;
Irp = IoBuildSynchronousFsdRequest(IRP_MJ_READ,
DeviceObject,
Mbr,
Sector,
SectorSize,
&Offset,
&Event,
@ -224,34 +223,37 @@ xHalExamineMBR(IN PDEVICE_OBJECT DeviceObject,
if (!NT_SUCCESS(Status))
{
DPRINT("xHalExamineMBR failed (Status = 0x%08lx)\n",
DPRINT1("Reading MBR failed (Status 0x%08lx)\n",
Status);
ExFreePool(Mbr);
ExFreePool(Sector);
return;
}
Mbr = (PMBR)Sector;
if (Mbr->Magic != PARTITION_MAGIC)
{
DPRINT("xHalExamineMBR: invalid MBR magic value\n");
ExFreePool(Mbr);
DPRINT1("Invalid MBR magic value\n");
ExFreePool(Sector);
return;
}
if (Mbr->Partition[0].PartitionType != MBRTypeIdentifier)
{
DPRINT("xHalExamineMBR: invalid MBRTypeIdentifier\n");
ExFreePool(Mbr);
DPRINT1("Invalid MBRTypeIdentifier\n");
ExFreePool(Sector);
return;
}
if (Mbr->Partition[0].PartitionType == 0x54)
{
/* Found 'Ontrack Disk Manager'. Shift all sectors by 63 */
DPRINT1("Found 'Ontrack Disk Manager'!\n");
Shift = (PULONG)Mbr;
*Shift = 63;
}
*Buffer = (PVOID)Mbr;
*Buffer = (PVOID)Sector;
}