ULONG CurrentCluster,
PULONG NextCluster)
{
+ NTSTATUS Status = STATUS_SUCCESS;
PVOID BaseAddress;
ULONG FATOffset;
ULONG ChunkSize;
ChunkSize = CACHEPAGESIZE(DeviceExt);
FATOffset = CurrentCluster * sizeof(ULONG);
Offset.QuadPart = ROUND_DOWN(FATOffset, ChunkSize);
- if (!CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, 1, &Context, &BaseAddress))
+ _SEH2_TRY
+ {
+ CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, MAP_WAIT, &Context, &BaseAddress);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- return STATUS_UNSUCCESSFUL;
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
+ _SEH2_END;
CurrentCluster = (*(PULONG)((char*)BaseAddress + (FATOffset % ChunkSize))) & 0x0fffffff;
if (CurrentCluster >= 0xffffff8 && CurrentCluster <= 0xfffffff)
CurrentCluster = 0xffffffff;
+ if (CurrentCluster == 0)
+ {
+ DPRINT1("WARNING: File system corruption detected. You may need to run a disk repair utility.\n");
+ Status = STATUS_FILE_CORRUPT_ERROR;
+ if (VfatGlobalData->Flags & VFAT_BREAK_ON_CORRUPTION)
+ ASSERT(CurrentCluster != 0);
+ }
CcUnpinData(Context);
*NextCluster = CurrentCluster;
- return STATUS_SUCCESS;
+ return Status;
}
/*
ULONG CurrentCluster,
PULONG NextCluster)
{
+ NTSTATUS Status = STATUS_SUCCESS;
PVOID BaseAddress;
ULONG FATOffset;
ULONG ChunkSize;
ChunkSize = CACHEPAGESIZE(DeviceExt);
FATOffset = CurrentCluster * 2;
Offset.QuadPart = ROUND_DOWN(FATOffset, ChunkSize);
- if (!CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, MAP_WAIT, &Context, &BaseAddress))
+ _SEH2_TRY
+ {
+ CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, MAP_WAIT, &Context, &BaseAddress);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- return STATUS_UNSUCCESSFUL;
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
+ _SEH2_END;
CurrentCluster = *((PUSHORT)((char*)BaseAddress + (FATOffset % ChunkSize)));
if (CurrentCluster >= 0xfff8 && CurrentCluster <= 0xffff)
CurrentCluster = 0xffffffff;
+
+ if (CurrentCluster == 0)
+ {
+ DPRINT1("WARNING: File system corruption detected. You may need to run a disk repair utility.\n");
+ Status = STATUS_FILE_CORRUPT_ERROR;
+ if (VfatGlobalData->Flags & VFAT_BREAK_ON_CORRUPTION)
+ ASSERT(CurrentCluster != 0);
+ }
+
CcUnpinData(Context);
*NextCluster = CurrentCluster;
- return STATUS_SUCCESS;
+ return Status;
}
/*
*NextCluster = 0;
Offset.QuadPart = 0;
- if (!CcMapData(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, 1, &Context, &BaseAddress))
+ _SEH2_TRY
+ {
+ CcMapData(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, MAP_WAIT, &Context, &BaseAddress);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- return STATUS_UNSUCCESSFUL;
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
+ _SEH2_END;
CBlock = (PUSHORT)((char*)BaseAddress + (CurrentCluster * 12) / 8);
if ((CurrentCluster % 2) == 0)
Entry = 0xffffffff;
// DPRINT("Returning %x\n",Entry);
+ ASSERT(Entry != 0);
*NextCluster = Entry;
CcUnpinData(Context);
// return Entry == 0xffffffff ? STATUS_END_OF_FILE : STATUS_SUCCESS;
for (i = StartCluster; i < FatLength;)
{
Offset.QuadPart = ROUND_DOWN(i * 2, ChunkSize);
- if (!CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, 1, &Context, &BaseAddress))
+ _SEH2_TRY
{
- DPRINT1("CcMapData(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, ChunkSize);
- return STATUS_UNSUCCESSFUL;
+ CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, PIN_WAIT, &Context, &BaseAddress);
}
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ DPRINT1("CcPinRead(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, ChunkSize);
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
+ }
+ _SEH2_END;
Block = (PUSHORT)((ULONG_PTR)BaseAddress + (i * 2) % ChunkSize);
BlockEnd = (PUSHORT)((ULONG_PTR)BaseAddress + ChunkSize);
*Cluster = 0;
StartCluster = DeviceExt->LastAvailableCluster;
Offset.QuadPart = 0;
- if (!CcPinRead(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, 1, &Context, &BaseAddress))
+ _SEH2_TRY
{
- DPRINT1("CcMapData(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector);
- return STATUS_UNSUCCESSFUL;
+ CcPinRead(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, PIN_WAIT, &Context, &BaseAddress);
}
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ DPRINT1("CcPinRead(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector);
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
+ }
+ _SEH2_END;
for (j = 0; j < 2; j++)
{
for (i = StartCluster; i < FatLength;)
{
Offset.QuadPart = ROUND_DOWN(i * 4, ChunkSize);
- if (!CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, 1, &Context, &BaseAddress))
+ _SEH2_TRY
+ {
+ CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, PIN_WAIT, &Context, &BaseAddress);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- DPRINT1("CcMapData(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, ChunkSize);
- return STATUS_UNSUCCESSFUL;
+ DPRINT1("CcPinRead(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, ChunkSize);
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
+ _SEH2_END;
Block = (PULONG)((ULONG_PTR)BaseAddress + (i * 4) % ChunkSize);
BlockEnd = (PULONG)((ULONG_PTR)BaseAddress + ChunkSize);
PUSHORT CBlock;
Offset.QuadPart = 0;
- if (!CcMapData(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, 1, &Context, &BaseAddress))
+ _SEH2_TRY
+ {
+ CcMapData(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, MAP_WAIT, &Context, &BaseAddress);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- return STATUS_UNSUCCESSFUL;
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
+ _SEH2_END;
numberofclusters = DeviceExt->FatInfo.NumberOfClusters + 2;
for (i = 2; i < FatLength; )
{
Offset.QuadPart = ROUND_DOWN(i * 2, ChunkSize);
- if (!CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, 1, &Context, &BaseAddress))
+ _SEH2_TRY
+ {
+ CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, MAP_WAIT, &Context, &BaseAddress);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- return STATUS_UNSUCCESSFUL;
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
+ _SEH2_END;
Block = (PUSHORT)((ULONG_PTR)BaseAddress + (i * 2) % ChunkSize);
BlockEnd = (PUSHORT)((ULONG_PTR)BaseAddress + ChunkSize);
for (i = 2; i < FatLength; )
{
Offset.QuadPart = ROUND_DOWN(i * 4, ChunkSize);
- if (!CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, 1, &Context, &BaseAddress))
+ _SEH2_TRY
+ {
+ CcMapData(DeviceExt->FATFileObject, &Offset, ChunkSize, MAP_WAIT, &Context, &BaseAddress);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
DPRINT1("CcMapData(Offset %x, Length %u) failed\n", (ULONG)Offset.QuadPart, ChunkSize);
- return STATUS_UNSUCCESSFUL;
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
+ _SEH2_END;
Block = (PULONG)((ULONG_PTR)BaseAddress + (i * 4) % ChunkSize);
BlockEnd = (PULONG)((ULONG_PTR)BaseAddress + ChunkSize);
LARGE_INTEGER Offset;
Offset.QuadPart = 0;
- if (!CcPinRead(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, 1, &Context, &BaseAddress))
+ _SEH2_TRY
{
- return STATUS_UNSUCCESSFUL;
+ CcPinRead(DeviceExt->FATFileObject, &Offset, DeviceExt->FatInfo.FATSectors * DeviceExt->FatInfo.BytesPerSector, PIN_WAIT, &Context, &BaseAddress);
}
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
+ {
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
+ }
+ _SEH2_END;
CBlock = (PUCHAR)BaseAddress;
FATOffset = (ClusterToWrite * 12) / 8;
ChunkSize = CACHEPAGESIZE(DeviceExt);
FATOffset = ClusterToWrite * 2;
Offset.QuadPart = ROUND_DOWN(FATOffset, ChunkSize);
- if (!CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, 1, &Context, &BaseAddress))
+ _SEH2_TRY
+ {
+ CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, PIN_WAIT, &Context, &BaseAddress);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- return STATUS_UNSUCCESSFUL;
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
+ _SEH2_END;
DPRINT("Writing 0x%x for offset 0x%x 0x%x\n", NewValue, FATOffset,
ClusterToWrite);
FATOffset = (ClusterToWrite * 4);
Offset.QuadPart = ROUND_DOWN(FATOffset, ChunkSize);
- if (!CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, 1, &Context, &BaseAddress))
+ _SEH2_TRY
+ {
+ CcPinRead(DeviceExt->FATFileObject, &Offset, ChunkSize, PIN_WAIT, &Context, &BaseAddress);
+ }
+ _SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
{
- return STATUS_UNSUCCESSFUL;
+ _SEH2_YIELD(return _SEH2_GetExceptionCode());
}
+ _SEH2_END;
DPRINT("Writing 0x%x for offset 0x%x 0x%x\n", NewValue, FATOffset,
ClusterToWrite);
DeviceExt, CurrentCluster);
if (CurrentCluster == 0)
- return STATUS_INVALID_PARAMETER;
+ {
+ DPRINT1("WARNING: File system corruption detected. You may need to run a disk repair utility.\n");
+ if (VfatGlobalData->Flags & VFAT_BREAK_ON_CORRUPTION)
+ ASSERT(CurrentCluster != 0);
+ return STATUS_FILE_CORRUPT_ERROR;
+ }
ExAcquireResourceSharedLite(&DeviceExt->FatResource, TRUE);
Status = DeviceExt->GetNextCluster(DeviceExt, CurrentCluster, NextCluster);