ntoskrnl/cache/mdlsup.c

   1 /*
   2  * COPYRIGHT:       See COPYING in the top level directory
   3  * PROJECT:         ReactOS Kernel
   4  * FILE:            ntoskrnl/cache/logsup.c
   5  * PURPOSE:         Logging and configuration routines
   6  * PROGRAMMERS:     Alex Ionescu (alex.ionescu@reactos.org)
   7  */
   8
   9 /* INCLUDES *******************************************************************/
  10
  11 #include <ntoskrnl.h>
  12 #include "newcc.h"
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 /* GLOBALS ********************************************************************/
  17
  18 /* FUNCTIONS ******************************************************************/
  19
  20 PMDL
  21 NTAPI
  22 CcpBuildCacheMdl(PFILE_OBJECT FileObject,
  23                  PLARGE_INTEGER FileOffset,
  24                  ULONG Length,
  25                  PIO_STATUS_BLOCK IOSB)
  26 {
  27     PMDL Mdl;
  28     PVOID Bcb, Buffer;
  29
  30     BOOLEAN Result = CcMapData(FileObject,
  31                                FileOffset,
  32                                Length,
  33                                PIN_WAIT,
  34                                &Bcb,
  35                                &Buffer);
  36
  37     if (!Result)
  38     {
  39         IOSB->Information = 0;
  40         IOSB->Status = STATUS_UNSUCCESSFUL;
  41         return NULL;
  42     }
  43
  44     IOSB->Information = Length;
  45     IOSB->Status = STATUS_SUCCESS;
  46
  47     Mdl = IoAllocateMdl(Buffer, Length, FALSE, FALSE, NULL);
  48
  49     if (!Mdl)
  50     {
  51         IOSB->Information = 0;
  52         IOSB->Status = STATUS_NO_MEMORY;
  53         return NULL;
  54     }
  55
  56     IOSB->Information = Length;
  57     IOSB->Status = STATUS_SUCCESS;
  58
  59     return Mdl;
  60 }
  61
  62 VOID
  63 NTAPI
  64 CcMdlRead(IN PFILE_OBJECT FileObject,
  65           IN PLARGE_INTEGER FileOffset,
  66           IN ULONG Length,
  67           OUT PMDL *MdlChain,
  68           OUT PIO_STATUS_BLOCK IoStatus)
  69 {
  70     *MdlChain = CcpBuildCacheMdl(FileObject, FileOffset, Length, IoStatus);
  71 }
  72
  73 VOID
  74 NTAPI
  75 CcMdlReadComplete(IN PFILE_OBJECT FileObject,
  76                   IN PMDL MdlChain)
  77 {
  78     IoFreeMdl(MdlChain);
  79 }
  80
  81 VOID
  82 NTAPI
  83 CcMdlReadComplete2(IN PMDL MdlChain,
  84                    IN PFILE_OBJECT FileObject)
  85 {
  86     UNIMPLEMENTED
  87 }
  88
  89 VOID
  90 NTAPI
  91 CcPrepareMdlWrite(IN PFILE_OBJECT FileObject,
  92                   IN PLARGE_INTEGER FileOffset,
  93                   IN ULONG Length,
  94                   OUT PMDL *MdlChain,
  95                   OUT PIO_STATUS_BLOCK IoStatus)
  96 {
  97     *MdlChain = CcpBuildCacheMdl(FileObject, FileOffset, Length, IoStatus);
  98 }
  99
 100 VOID
 101 NTAPI
 102 CcMdlWriteComplete(IN PFILE_OBJECT FileObject,
 103                    IN PLARGE_INTEGER FileOffset,
 104                    IN PMDL MdlChain)
 105 {
 106     IoFreeMdl(MdlChain);
 107 }
 108
 109 VOID
 110 NTAPI
 111 CcMdlWriteComplete2(IN PFILE_OBJECT FileObject,
 112                     IN PLARGE_INTEGER FileOffset,
 113                     IN PMDL MdlChain)
 114 {
 115     UNIMPLEMENTED
 116 }
 117
 118 VOID
 119 NTAPI
 120 CcMdlWriteAbort(IN PFILE_OBJECT FileObject,
 121                 IN PMDL MdlChain)
 122 {
 123     ASSERT(FALSE);
 124     IoFreeMdl(MdlChain);
 125 }
 126
 127 /* EOF */