drivers/filesystems/cdfs/fastio.c

   1 /*
   2  * COPYRIGHT:        See COPYING in the top level directory
   3  * PROJECT:          ReactOS kernel
   4  * FILE:             drivers/filesystems/cdfs/fastio.c
   5  * PURPOSE:          CDROM (ISO 9660) filesystem driver
   6  * PROGRAMMER:       Pierre Schweitzer
   7  */
   8
   9 /* INCLUDES *****************************************************************/
  10
  11 #include "cdfs.h"
  12
  13 #define NDEBUG
  14 #include <debug.h>
  15
  16 /* FUNCTIONS ****************************************************************/
  17
  18 BOOLEAN
  19 NTAPI
  20 CdfsAcquireForLazyWrite(
  21     _In_ PVOID Context,
  22     _In_ BOOLEAN Wait)
  23 {
  24     PFCB Fcb = (PFCB)Context;
  25     ASSERT(Fcb);
  26     DPRINT("CdfsAcquireForLazyWrite(): Fcb %p\n", Fcb);
  27
  28     if (!ExAcquireResourceExclusiveLite(&(Fcb->MainResource), Wait))
  29     {
  30         DPRINT("CdfsAcquireForLazyWrite(): ExReleaseResourceLite failed.\n");
  31         return FALSE;
  32     }
  33     return TRUE;
  34 }
  35
  36 VOID
  37 NTAPI
  38 CdfsReleaseFromLazyWrite(
  39     _In_ PVOID Context)
  40 {
  41     PFCB Fcb = (PFCB)Context;
  42     ASSERT(Fcb);
  43     DPRINT("CdfsReleaseFromLazyWrite(): Fcb %p\n", Fcb);
  44
  45     ExReleaseResourceLite(&(Fcb->MainResource));
  46 }
  47
  48 BOOLEAN
  49 NTAPI
  50 CdfsFastIoCheckIfPossible(
  51     _In_ PFILE_OBJECT FileObject,
  52     _In_ PLARGE_INTEGER FileOffset,
  53     _In_ ULONG Length,
  54     _In_ BOOLEAN Wait,
  55     _In_ ULONG LockKey,
  56     _In_ BOOLEAN CheckForReadOperation,
  57     _Out_ PIO_STATUS_BLOCK IoStatus,
  58     _In_ PDEVICE_OBJECT DeviceObject)
  59 {
  60     /* Deny FastIo */
  61     UNREFERENCED_PARAMETER(FileObject);
  62     UNREFERENCED_PARAMETER(FileOffset);
  63     UNREFERENCED_PARAMETER(Length);
  64     UNREFERENCED_PARAMETER(Wait);
  65     UNREFERENCED_PARAMETER(LockKey);
  66     UNREFERENCED_PARAMETER(CheckForReadOperation);
  67     UNREFERENCED_PARAMETER(IoStatus);
  68     UNREFERENCED_PARAMETER(DeviceObject);
  69     return FALSE;
  70 }
  71
  72 BOOLEAN
  73 NTAPI
  74 CdfsFastIoRead(
  75     _In_ PFILE_OBJECT FileObject,
  76     _In_ PLARGE_INTEGER FileOffset,
  77     _In_ ULONG Length,
  78     _In_ BOOLEAN Wait,
  79     _In_ ULONG LockKey,
  80     _Out_ PVOID Buffer,
  81     _Out_ PIO_STATUS_BLOCK IoStatus,
  82     _In_ PDEVICE_OBJECT DeviceObject)
  83 {
  84     DBG_UNREFERENCED_PARAMETER(FileObject);
  85     DBG_UNREFERENCED_PARAMETER(FileOffset);
  86     DBG_UNREFERENCED_PARAMETER(Length);
  87     DBG_UNREFERENCED_PARAMETER(Wait);
  88     DBG_UNREFERENCED_PARAMETER(LockKey);
  89     DBG_UNREFERENCED_PARAMETER(Buffer);
  90     DBG_UNREFERENCED_PARAMETER(IoStatus);
  91     DBG_UNREFERENCED_PARAMETER(DeviceObject);
  92     return FALSE;
  93 }
  94
  95 BOOLEAN
  96 NTAPI
  97 CdfsFastIoWrite(
  98     _In_ PFILE_OBJECT FileObject,
  99     _In_ PLARGE_INTEGER FileOffset,
 100     _In_ ULONG Length,
 101     _In_ BOOLEAN Wait,
 102     _In_ ULONG LockKey,
 103     _In_ PVOID Buffer,
 104     _Out_ PIO_STATUS_BLOCK IoStatus,
 105     _In_ PDEVICE_OBJECT DeviceObject)
 106 {
 107     DBG_UNREFERENCED_PARAMETER(FileObject);
 108     DBG_UNREFERENCED_PARAMETER(FileOffset);
 109     DBG_UNREFERENCED_PARAMETER(Length);
 110     DBG_UNREFERENCED_PARAMETER(Wait);
 111     DBG_UNREFERENCED_PARAMETER(LockKey);
 112     DBG_UNREFERENCED_PARAMETER(Buffer);
 113     DBG_UNREFERENCED_PARAMETER(IoStatus);
 114     DBG_UNREFERENCED_PARAMETER(DeviceObject);
 115     return FALSE;
 116 }