huwcampbell.com
Reactos
1/*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS Kernel
4 * FILE: ntoskrnl/cache/mdlsup.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
20PMDL
21NTAPI
22CcpBuildCacheMdl(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
62VOID
63NTAPI
64CcMdlRead(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
73VOID
74NTAPI
75CcMdlReadComplete(IN PFILE_OBJECT FileObject,
76 IN PMDL MdlChain)
77{
78 IoFreeMdl(MdlChain);
79}
80
81VOID
82NTAPI
83CcMdlReadComplete2(IN PFILE_OBJECT FileObject,
84 IN PMDL MdlChain)
85{
86 UNIMPLEMENTED
87}
88
89VOID
90NTAPI
91CcPrepareMdlWrite(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
100VOID
101NTAPI
102CcMdlWriteComplete(IN PFILE_OBJECT FileObject,
103 IN PLARGE_INTEGER FileOffset,
104 IN PMDL MdlChain)
105{
106 IoFreeMdl(MdlChain);
107}
108
109VOID
110NTAPI
111CcMdlWriteComplete2(IN PFILE_OBJECT FileObject,
112 IN PLARGE_INTEGER FileOffset,
113 IN PMDL MdlChain)
114{
115 UNIMPLEMENTED
116}
117
118VOID
119NTAPI
120CcMdlWriteAbort(IN PFILE_OBJECT FileObject,
121 IN PMDL MdlChain)
122{
123 ASSERT(FALSE);
124 IoFreeMdl(MdlChain);
125}
126
127/* EOF */