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xHalIoReadPartitionTable() can now handle partially corrupted partition tables

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svn path=/trunk/; revision=1311
This commit is contained in:
Eric Kohl 2000-08-22 14:10:59 +00:00
parent 6f1d7ad00c
commit e7dc6b7c4b
1 changed files with 41 additions and 18 deletions
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59
reactos/ntoskrnl/io/xhaldrv.c
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@ -1,4 +1,4 @@
/* $Id: xhaldrv.c,v 1.3 2000/08/21 00:14:04 ekohl Exp $
/* $Id: xhaldrv.c,v 1.4 2000/08/22 14:10:59 ekohl Exp $
*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
@ -236,9 +236,9 @@ xHalExamineMBR (
static VOID
HalpAssignDrive (
PUNICODE_STRING PartitionName,
PULONG DriveMap,
ULONG DriveNumber
IN PUNICODE_STRING PartitionName,
IN OUT PULONG DriveMap,
IN ULONG DriveNumber
)
{
WCHAR DriveNameBuffer[8];
@ -308,7 +308,7 @@ xHalIoAssignDriveLetters (
OUT PSTRING NtSystemPathString
)
{
PDRIVE_LAYOUT_INFORMATION LayoutInfo; // ebp-4
PDRIVE_LAYOUT_INFORMATION LayoutInfo;
PCONFIGURATION_INFORMATION ConfigInfo;
OBJECT_ATTRIBUTES ObjectAttributes;
IO_STATUS_BLOCK StatusBlock;
@ -585,7 +585,7 @@ xHalIoReadPartitionTable (
{
KEVENT Event;
IO_STATUS_BLOCK StatusBlock;
LARGE_INTEGER Offset;
ULARGE_INTEGER Offset;
PUCHAR SectorBuffer;
PIRP Irp;
NTSTATUS Status;
@ -630,10 +630,10 @@ xHalIoReadPartitionTable (
FALSE);
Irp = IoBuildSynchronousFsdRequest (IRP_MJ_READ,
DeviceObject,
DeviceObject,
SectorBuffer,
SectorSize,
&Offset,
(PLARGE_INTEGER)&Offset,
&Event,
&StatusBlock);
@ -651,8 +651,8 @@ xHalIoReadPartitionTable (
if (!NT_SUCCESS(Status))
{
DPRINT("xHalIoReadPartitonTable failed (Status = 0x%08lx)\n",
Status);
DPRINT1("xHalIoReadPartitonTable failed (Status = 0x%08lx)\n",
Status);
ExFreePool (SectorBuffer);
ExFreePool (LayoutBuffer);
return Status;
@ -664,10 +664,13 @@ xHalIoReadPartitionTable (
DPRINT("Magic %x\n", PartitionTable->Magic);
if (PartitionTable->Magic != PARTITION_MAGIC)
{
DPRINT("Invalid partition table magic\n");
DPRINT1("Invalid partition table magic\n");
ExFreePool (SectorBuffer);
ExFreePool (LayoutBuffer);
return STATUS_UNSUCCESSFUL;
// ExFreePool (LayoutBuffer);
// return STATUS_UNSUCCESSFUL;
*PartitionBuffer = LayoutBuffer;
return STATUS_SUCCESS;
}
#ifndef NDEBUG
@ -702,10 +705,18 @@ xHalIoReadPartitionTable (
Count = LayoutBuffer->PartitionCount;
DPRINT("Logical Partition %u\n", Count);
LayoutBuffer->PartitionEntry[Count].StartingOffset.QuadPart =
PartitionTable->Partition[i].StartingBlock * SectorSize;
if (PartitionTable->Partition[i].StartingBlock)
{
LayoutBuffer->PartitionEntry[Count].StartingOffset.QuadPart =
(ULONGLONG)Offset.QuadPart +
((ULONGLONG)PartitionTable->Partition[i].StartingBlock * (ULONGLONG)SectorSize);
}
else
{
LayoutBuffer->PartitionEntry[Count].StartingOffset.QuadPart = 0;
}
LayoutBuffer->PartitionEntry[Count].PartitionLength.QuadPart =
PartitionTable->Partition[i].SectorCount * SectorSize;
(ULONGLONG)PartitionTable->Partition[i].SectorCount * (ULONGLONG)SectorSize;
LayoutBuffer->PartitionEntry[Count].HiddenSectors = 0;
if (IsUsablePartition(PartitionTable->Partition[i].PartitionType))
@ -726,13 +737,25 @@ xHalIoReadPartitionTable (
IsRecognizedPartition (PartitionTable->Partition[i].PartitionType);
LayoutBuffer->PartitionEntry[Count].RewritePartition = FALSE;
DPRINT(" Offset: 0x%I64x", Offset.QuadPart);
if (IsExtendedPartition(PartitionTable->Partition[i].PartitionType))
{
Offset.QuadPart +=
(PartitionTable->Partition[i].StartingBlock * SectorSize);
Offset.QuadPart = (ULONGLONG)Offset.QuadPart +
((ULONGLONG)PartitionTable->Partition[i].StartingBlock * (ULONGLONG)SectorSize);
ExtendedFound = TRUE;
}
DPRINT(" Offset: 0x%I64x\n", Offset.QuadPart);
DPRINT(" %ld: nr: %d boot: %1x type: %x start: 0x%I64x count: 0x%I64x\n",
Count,
LayoutBuffer->PartitionEntry[Count].PartitionNumber,
LayoutBuffer->PartitionEntry[Count].BootIndicator,
LayoutBuffer->PartitionEntry[Count].PartitionType,
LayoutBuffer->PartitionEntry[Count].StartingOffset.QuadPart,
LayoutBuffer->PartitionEntry[Count].PartitionLength.QuadPart);
LayoutBuffer->PartitionCount++;
}
}