sdk/include/ddk/lowio.h

   1 #ifndef _RXLOWIO_
   2 #define _RXLOWIO_
   3
   4 #include "mrx.h"
   5
   6 extern FAST_MUTEX RxLowIoPagingIoSyncMutex;
   7
   8 #define RxLowIoIsMdlLocked(MDL) (RxMdlIsLocked((MDL)) || RxMdlSourceIsNonPaged((MDL)))
   9
  10 #define RxLowIoIsBufferLocked(LowIoContext)                              \
  11     (((LowIoContext)->Operation > LOWIO_OP_WRITE) ||                     \
  12      ((LowIoContext)->ParamsFor.ReadWrite.Buffer == NULL) ||             \
  13      (((LowIoContext)->ParamsFor.ReadWrite.Buffer != NULL) &&            \
  14        RxLowIoIsMdlLocked(((LowIoContext)->ParamsFor.ReadWrite.Buffer))))
  15
  16
  17 typedef struct _LOWIO_PER_FCB_INFO
  18 {
  19     LIST_ENTRY PagingIoReadsOutstanding;
  20     LIST_ENTRY PagingIoWritesOutstanding;
  21 } LOWIO_PER_FCB_INFO, *PLOWIO_PER_FCB_INFO;
  22
  23 #if (_WIN32_WINNT >= 0x0600)
  24 NTSTATUS
  25 NTAPI
  26 RxLowIoPopulateFsctlInfo(
  27     _In_ PRX_CONTEXT RxContext,
  28     _In_ PIRP Irp);
  29 #else
  30 NTSTATUS
  31 NTAPI
  32 RxLowIoPopulateFsctlInfo(
  33     _In_ PRX_CONTEXT RxContext);
  34 #endif
  35
  36 #if (_WIN32_WINNT >= 0x0600)
  37 NTSTATUS
  38 NTAPI
  39 RxLowIoSubmit(
  40     _In_ PRX_CONTEXT RxContext,
  41     _In_ PIRP Irp,
  42     _In_ PFCB Fcb,
  43     _In_ PLOWIO_COMPLETION_ROUTINE CompletionRoutine);
  44 #else
  45 NTSTATUS
  46 NTAPI
  47 RxLowIoSubmit(
  48     _In_ PRX_CONTEXT RxContext,
  49     _In_ PLOWIO_COMPLETION_ROUTINE CompletionRoutine);
  50 #endif
  51
  52 NTSTATUS
  53 NTAPI
  54 RxLowIoCompletion(
  55     _In_ PRX_CONTEXT RxContext);
  56
  57 #if (_WIN32_WINNT >= 0x0600)
  58 VOID
  59 NTAPI
  60 RxInitializeLowIoContext(
  61     _In_ PRX_CONTEXT RxContext,
  62     _In_ ULONG Operation,
  63     _Out_ PLOWIO_CONTEXT LowIoContext);
  64 #else
  65 VOID
  66 NTAPI
  67 RxInitializeLowIoContext(
  68     _Out_ PLOWIO_CONTEXT LowIoContext,
  69     _In_ ULONG Operation);
  70 #endif
  71
  72 VOID
  73 RxInitializeLowIoPerFcbInfo(
  74     _Inout_ PLOWIO_PER_FCB_INFO LowIoPerFcbInfo);
  75
  76 #endif