- Update to r53061
[reactos.git] / drivers / filesystems / ntfs / ntfs.c
1 /*
2 * ReactOS kernel
3 * Copyright (C) 2002 ReactOS Team
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
18 *
19 * COPYRIGHT: See COPYING in the top level directory
20 * PROJECT: ReactOS kernel
21 * FILE: drivers/filesystem/ntfs/ntfs.c
22 * PURPOSE: NTFS filesystem driver
23 * PROGRAMMER: Eric Kohl
24 * Pierre Schweitzer
25 */
26
27 /* INCLUDES *****************************************************************/
28
29 #include "ntfs.h"
30
31 #define NDEBUG
32 #include <debug.h>
33
34 /* GLOBALS *****************************************************************/
35
36 PNTFS_GLOBAL_DATA NtfsGlobalData = NULL;
37
38
39 /* FUNCTIONS ****************************************************************/
40
41 NTSTATUS NTAPI
42 DriverEntry(PDRIVER_OBJECT DriverObject,
43 PUNICODE_STRING RegistryPath)
44 /*
45 * FUNCTION: Called by the system to initalize the driver
46 * ARGUMENTS:
47 * DriverObject = object describing this driver
48 * RegistryPath = path to our configuration entries
49 * RETURNS: Success or failure
50 */
51 {
52 NTSTATUS Status;
53 UNICODE_STRING DeviceName = RTL_CONSTANT_STRING(DEVICE_NAME);
54
55 TRACE_(NTFS, "DriverEntry(%p, '%wZ')\n", DriverObject, RegistryPath);
56
57 /* Initialize global data */
58 NtfsGlobalData = ExAllocatePoolWithTag(NonPagedPool, sizeof(NTFS_GLOBAL_DATA), 'GRDN');
59 if (!NtfsGlobalData)
60 {
61 Status = STATUS_INSUFFICIENT_RESOURCES;
62 goto ErrorEnd;
63 }
64 RtlZeroMemory(NtfsGlobalData, sizeof(NTFS_GLOBAL_DATA));
65 NtfsGlobalData->Identifier.Type = NTFS_TYPE_GLOBAL_DATA;
66 NtfsGlobalData->Identifier.Size = sizeof(NTFS_GLOBAL_DATA);
67
68 ExInitializeResourceLite(&NtfsGlobalData->Resource);
69
70 /* Keep trace of Driver Object */
71 NtfsGlobalData->DriverObject = DriverObject;
72
73 /* Initialize IRP functions array */
74 NtfsInitializeFunctionPointers(DriverObject);
75
76 /* Initialize CC functions array */
77 NtfsGlobalData->CacheMgrCallbacks.AcquireForLazyWrite = NtfsAcqLazyWrite;
78 NtfsGlobalData->CacheMgrCallbacks.ReleaseFromLazyWrite = NtfsRelLazyWrite;
79 NtfsGlobalData->CacheMgrCallbacks.AcquireForReadAhead = NtfsAcqReadAhead;
80 NtfsGlobalData->CacheMgrCallbacks.ReleaseFromReadAhead = NtfsRelReadAhead;
81
82 /* Driver can't be unloaded */
83 DriverObject->DriverUnload = NULL;
84
85 Status = IoCreateDevice(DriverObject,
86 sizeof(NTFS_GLOBAL_DATA),
87 &DeviceName,
88 FILE_DEVICE_DISK_FILE_SYSTEM,
89 0,
90 FALSE,
91 &NtfsGlobalData->DeviceObject);
92 if (!NT_SUCCESS(Status))
93 {
94 WARN_(NTFS, "IoCreateDevice failed with status: %lx\n", Status);
95 goto ErrorEnd;
96 }
97
98 NtfsGlobalData->DeviceObject->Flags |= DO_DIRECT_IO;
99
100 /* Register file system */
101 IoRegisterFileSystem(NtfsGlobalData->DeviceObject);
102 ObReferenceObject(NtfsGlobalData->DeviceObject);
103
104 ErrorEnd:
105 if (!NT_SUCCESS(Status))
106 {
107 if (NtfsGlobalData)
108 {
109 ExDeleteResourceLite(&NtfsGlobalData->Resource);
110 ExFreePoolWithTag(NtfsGlobalData, 'GRDN');
111 }
112 }
113
114 return Status;
115 }
116
117 VOID NTAPI
118 NtfsInitializeFunctionPointers(PDRIVER_OBJECT DriverObject)
119 /*
120 * FUNCTION: Called within the driver entry to initialize the IRP functions array
121 * ARGUMENTS:
122 * DriverObject = object describing this driver
123 * RETURNS: Nothing
124 */
125 {
126 DriverObject->MajorFunction[IRP_MJ_CREATE] = NtfsFsdCreate;
127 DriverObject->MajorFunction[IRP_MJ_CLOSE] = NtfsFsdClose;
128 DriverObject->MajorFunction[IRP_MJ_READ] = NtfsFsdRead;
129 DriverObject->MajorFunction[IRP_MJ_WRITE] = NtfsFsdWrite;
130 DriverObject->MajorFunction[IRP_MJ_QUERY_INFORMATION] = NtfsFsdQueryInformation;
131 DriverObject->MajorFunction[IRP_MJ_QUERY_VOLUME_INFORMATION] = NtfsFsdDispatch;
132 DriverObject->MajorFunction[IRP_MJ_SET_VOLUME_INFORMATION] = NtfsFsdDispatch;
133 DriverObject->MajorFunction[IRP_MJ_DIRECTORY_CONTROL] = NtfsFsdDirectoryControl;
134 DriverObject->MajorFunction[IRP_MJ_FILE_SYSTEM_CONTROL] = NtfsFsdFileSystemControl;
135
136 return;
137 }
138