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sys: FSP_DEVICE_REJECT_EARLY_IRP macro

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This commit is contained in:
Bill Zissimopoulos 2020-02-07 13:22:09 -08:00
parent 0901fb6477
commit 8497855d80
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GPG Key ID: 3D4F95D52C7B3EA3
4 changed files with 15 additions and 0 deletions
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2
src/sys/create.c
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@ -284,8 +284,10 @@ static NTSTATUS FspFsvolCreateNoLock(
return STATUS_SUCCESS;
}
#if defined(FSP_DEVICE_REJECT_EARLY_IRP)
if (!FspFsvolDeviceReadyToAcceptIrp(FsvolDeviceObject))
return STATUS_CANCELLED;
#endif
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
ULONG CreateDisposition = (IrpSp->Parameters.Create.Options >> 24) & 0xff;

5
src/sys/driver.h
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@ -1028,6 +1028,7 @@ NTSTATUS FspStatisticsCopy(FSP_STATISTICS *Statistics, PVOID Buffer, PULONG PLen
#define FspStatisticsAdd(S,F,V) ((S)->F += (V))
/* device management */
#define FSP_DEVICE_REJECT_EARLY_IRP
enum
{
FspFsvolDeviceSecurityCacheCapacity = 100,
@ -1082,7 +1083,9 @@ typedef struct
FSP_FSEXT_PROVIDER *Provider;
UNICODE_STRING VolumePrefix;
UNICODE_PREFIX_TABLE_ENTRY VolumePrefixEntry;
#if defined(FSP_DEVICE_REJECT_EARLY_IRP)
LONG ReadyToAcceptIrp;
#endif
FSP_IOQ *Ioq;
FSP_META_CACHE *SecurityCache;
FSP_META_CACHE *DirInfoCache;
@ -1182,6 +1185,7 @@ VOID FspFsvolDeviceGetVolumeInfo(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_VOLUME_I
BOOLEAN FspFsvolDeviceTryGetVolumeInfo(PDEVICE_OBJECT DeviceObject, FSP_FSCTL_VOLUME_INFO *VolumeInfo);
VOID FspFsvolDeviceSetVolumeInfo(PDEVICE_OBJECT DeviceObject, const FSP_FSCTL_VOLUME_INFO *VolumeInfo);
VOID FspFsvolDeviceInvalidateVolumeInfo(PDEVICE_OBJECT DeviceObject);
#if defined(FSP_DEVICE_REJECT_EARLY_IRP)
static inline
BOOLEAN FspFsvolDeviceReadyToAcceptIrp(PDEVICE_OBJECT DeviceObject)
{
@ -1198,6 +1202,7 @@ VOID FspFsvolDeviceSetReadyToAcceptIrp(PDEVICE_OBJECT DeviceObject)
return;
InterlockedExchange(&FsvolDeviceExtension->ReadyToAcceptIrp, 1);
}
#endif
static inline
BOOLEAN FspFsvolDeviceVolumePrefixInString(PDEVICE_OBJECT DeviceObject, PUNICODE_STRING String)
{

4
src/sys/volinfo.c
View File

@ -286,8 +286,10 @@ static NTSTATUS FspFsvolQueryVolumeInformation(
{
PAGED_CODE();
#if defined(FSP_DEVICE_REJECT_EARLY_IRP)
if (!FspFsvolDeviceReadyToAcceptIrp(FsvolDeviceObject))
return STATUS_CANCELLED;
#endif
NTSTATUS Result;
PUINT8 Buffer = Irp->AssociatedIrp.SystemBuffer;
@ -417,8 +419,10 @@ static NTSTATUS FspFsvolSetVolumeInformation(
{
PAGED_CODE();
#if defined(FSP_DEVICE_REJECT_EARLY_IRP)
if (!FspFsvolDeviceReadyToAcceptIrp(FsvolDeviceObject))
return STATUS_CANCELLED;
#endif
NTSTATUS Result;
FS_INFORMATION_CLASS FsInformationClass = IrpSp->Parameters.SetVolume.FsInformationClass;

4
src/sys/volume.c
View File

@ -277,8 +277,10 @@ static NTSTATUS FspVolumeCreateNoLock(
RtlInitEmptyUnicodeString(&FsvolDeviceExtension->VolumeName,
FsvolDeviceExtension->VolumeNameBuf, sizeof FsvolDeviceExtension->VolumeNameBuf);
RtlCopyUnicodeString(&FsvolDeviceExtension->VolumeName, &VolumeName);
#if defined(FSP_DEVICE_REJECT_EARLY_IRP)
if (!FsvolDeviceExtension->VolumeParams.RejectIrpPriorToTransact0)
FsvolDeviceExtension->ReadyToAcceptIrp = 1;
#endif
Result = FspDeviceInitialize(FsvolDeviceObject);
if (NT_SUCCESS(Result))
{
@ -769,8 +771,10 @@ NTSTATUS FspVolumeTransact(
if (!FspDeviceReference(FsvolDeviceObject))
return STATUS_CANCELLED;
#if defined(FSP_DEVICE_REJECT_EARLY_IRP)
if (0 == InputBufferLength && 0 == OutputBufferLength)
FspFsvolDeviceSetReadyToAcceptIrp(FsvolDeviceObject);
#endif
NTSTATUS Result;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(FsvolDeviceObject);