drivers/fs/minix/cache.c

   1 /*
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS kernel
   4  * FILE:             services/fs/minix/cache.c
   5  * PURPOSE:          Minix FSD
   6  * PROGRAMMER:       David Welch (welch@mcmail.com)
   7  * UPDATE HISTORY:
   8  */
   9
  10 /* INCLUDES *****************************************************************/
  11
  12 #include <ddk/ntddk.h>
  13 #include <ddk/ntifs.h>
  14
  15 //#define NDEBUG
  16 #include <debug.h>
  17
  18 #include "minix.h"
  19
  20 /* FUNCTIONS ****************************************************************/
  21
  22 NTSTATUS MinixRequestCacheBlock(PDEVICE_OBJECT DeviceObject,
  23                                 PBCB Bcb,
  24                                 ULONG FileOffset,
  25                                 PVOID* BaseAddress,
  26                                 PCACHE_SEGMENT* CacheSeg)
  27 {
  28    BOOLEAN UptoDate;
  29
  30    CcRosRequestCacheSegment(Bcb,
  31                       FileOffset,
  32                       BaseAddress,
  33                       &UptoDate,
  34                       CacheSeg);
  35    if (!UptoDate)
  36      {
  37         MinixReadPage(DeviceObject,
  38                       PAGE_ROUND_DOWN(FileOffset),
  39                       BaseAddress);
  40      }
  41    BaseAddress = BaseAddress + (FileOffset % PAGE_SIZE);
  42
  43    return(STATUS_SUCCESS);
  44 }
  45