ntoskrnl/cc/misc.c

   1 /* INCLUDES ******************************************************************/
   2
   3 #include <ddk/ntddk.h>
   4 #include <ddk/ntifs.h>
   5 #include <internal/mm.h>
   6 #include <internal/cc.h>
   7 #include <internal/pool.h>
   8 #include <internal/io.h>
   9 #include <ntos/minmax.h>
  10
  11 #define NDEBUG
  12 #include <internal/debug.h>
  13
  14 /* GLOBALS *******************************************************************/
  15
  16 /* FUNCTIONS *****************************************************************/
  17
  18 /**********************************************************************
  19  * NAME                                                 INTERNAL
  20  *      CcMdlReadCompleteDev@8
  21  *
  22  * DESCRIPTION
  23  *
  24  * ARGUMENTS
  25  *      MdlChain
  26  *      DeviceObject
  27  *
  28  * RETURN VALUE
  29  *      None.
  30  *
  31  * NOTE
  32  *      Used by CcMdlReadComplete@8 and FsRtl
  33  */
  34 VOID STDCALL
  35 CcMdlReadCompleteDev (IN        PMDL            MdlChain,
  36                       IN        PDEVICE_OBJECT  DeviceObject)
  37 {
  38   UNIMPLEMENTED;
  39 }
  40
  41
  42 /**********************************************************************
  43  * NAME                                                 EXPORTED
  44  *      CcMdlReadComplete@8
  45  *
  46  * DESCRIPTION
  47  *
  48  * ARGUMENTS
  49  *
  50  * RETURN VALUE
  51  *      None.
  52  *
  53  * NOTE
  54  *      From Bo Branten's ntifs.h v13.
  55  */
  56 VOID STDCALL
  57 CcMdlReadComplete (IN   PFILE_OBJECT    FileObject,
  58                    IN   PMDL            MdlChain)
  59 {
  60    PDEVICE_OBJECT       DeviceObject = NULL;
  61
  62    DeviceObject = IoGetRelatedDeviceObject (FileObject);
  63    /* FIXME: try fast I/O first */
  64    CcMdlReadCompleteDev (MdlChain,
  65                          DeviceObject);
  66 }
  67
  68 VOID STDCALL
  69 CcSetFileSizes (IN PFILE_OBJECT FileObject,
  70                 IN PCC_FILE_SIZES FileSizes)
  71 {
  72   KIRQL oldirql;
  73   PBCB Bcb;
  74   PLIST_ENTRY current_entry;
  75   PCACHE_SEGMENT current;
  76
  77   DPRINT("CcSetFileSizes(FileObject %x, FileSizes %x)\n",
  78          FileObject, FileSizes);
  79   DPRINT("AllocationSize %d, FileSize %d, ValidDataLength %d\n",
  80          (ULONG)FileSizes->AllocationSize.QuadPart,
  81          (ULONG)FileSizes->FileSize.QuadPart,
  82          (ULONG)FileSizes->ValidDataLength.QuadPart);
  83
  84   Bcb = ((REACTOS_COMMON_FCB_HEADER*)FileObject->FsContext)->Bcb;
  85
  86   KeAcquireSpinLock(&Bcb->BcbLock, &oldirql);
  87
  88   if (FileSizes->AllocationSize.QuadPart < Bcb->AllocationSize.QuadPart)
  89     {
  90       current_entry = Bcb->BcbSegmentListHead.Flink;
  91       while (current_entry != &Bcb->BcbSegmentListHead)
  92       {
  93          current = CONTAINING_RECORD(current_entry, CACHE_SEGMENT,
  94                                      BcbSegmentListEntry);
  95          current_entry = current_entry->Flink;
  96          if (current->FileOffset > FileSizes->AllocationSize.QuadPart)
  97          {
  98             KeReleaseSpinLock(&Bcb->BcbLock, oldirql);
  99             CcRosFreeCacheSegment(Bcb, current);
 100             KeAcquireSpinLock(&Bcb->BcbLock, &oldirql);
 101             current_entry = Bcb->BcbSegmentListHead.Flink;
 102          }
 103       }
 104     }
 105   Bcb->AllocationSize = FileSizes->AllocationSize;
 106   Bcb->FileSize = FileSizes->FileSize;
 107   KeReleaseSpinLock(&Bcb->BcbLock, oldirql);
 108 }
 109