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sys: initial ProcessBuffer implementation

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This commit is contained in:
Bill Zissimopoulos
2017-02-23 16:06:55 -08:00
parent 441c45c77f
commit 4b43cc590f
10 changed files with 694 additions and 139 deletions
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25
src/sys/driver.h
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@ -601,6 +601,14 @@ VOID FspIrpHookReset(PIRP Irp);
PVOID FspIrpHookContext(PVOID Context);
NTSTATUS FspIrpHookNext(PDEVICE_OBJECT DeviceObject, PIRP Irp, PVOID Context);
/* process buffers */
#define FspProcessBufferSizeMax (64 * 1024)
NTSTATUS FspProcessBufferInitialize(VOID);
VOID FspProcessBufferFinalize(VOID);
VOID FspProcessBufferCollect(HANDLE ProcessId);
NTSTATUS FspProcessBufferAcquire(SIZE_T BufferSize, PVOID *PBufferCookie, PVOID *PBuffer);
VOID FspProcessBufferRelease(PVOID BufferCookie, PVOID Buffer);
/* IRP context */
#define FspIrpTimestampInfinity ((ULONG)-1L)
#define FspIrpTimestamp(Irp) \
@ -1048,6 +1056,23 @@ FSP_FSVOL_DEVICE_EXTENSION *FspFsvolDeviceExtension(PDEVICE_OBJECT DeviceObject)
ASSERT(FspFsvolDeviceExtensionKind == ((FSP_DEVICE_EXTENSION *)DeviceObject->DeviceExtension)->Kind);
return DeviceObject->DeviceExtension;
}
static inline
BOOLEAN FspFsvolDeviceReadShouldUseProcessBuffer(PDEVICE_OBJECT FsvolDeviceObject, SIZE_T BufferSize)
{
return FspProcessBufferSizeMax >= BufferSize ||
FspFsvolDeviceExtension(FsvolDeviceObject)->VolumeParams.AlwaysUseDoubleBuffering;
}
static inline
BOOLEAN FspFsvolDeviceWriteShouldUseProcessBuffer(PDEVICE_OBJECT FsvolDeviceObject, SIZE_T BufferSize)
{
return FspProcessBufferSizeMax >= BufferSize ||
FspFsvolDeviceExtension(FsvolDeviceObject)->VolumeParams.AlwaysUseDoubleBuffering;
}
static inline
BOOLEAN FspFsvolDeviceQueryDirectoryShouldUseProcessBuffer(PDEVICE_OBJECT FsvolDeviceObject, SIZE_T BufferSize)
{
return FspFsvolDeviceReadShouldUseProcessBuffer(FsvolDeviceObject, BufferSize);
}
NTSTATUS FspDeviceCreateSecure(UINT32 Kind, ULONG ExtraSize,
PUNICODE_STRING DeviceName, DEVICE_TYPE DeviceType, ULONG DeviceCharacteristics,
PUNICODE_STRING DeviceSddl, LPCGUID DeviceClassGuid,