[TRANSLATIONS]
[reactos.git] / reactos / drivers / filesystems / ntfs / misc.c
1 /*
2 * ReactOS kernel
3 * Copyright (C) 2008 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/misc.c
22 * PURPOSE: NTFS filesystem driver
23 * PROGRAMMER: Pierre Schweitzer
24 * UPDATE HISTORY:
25 */
26
27 /* INCLUDES *****************************************************************/
28
29 #include "ntfs.h"
30
31 #define NDEBUG
32 #include <debug.h>
33
34 /* FUNCTIONS ****************************************************************/
35
36 /*
37 * FUNCTION: Used with IRP to set them to TopLevelIrp field
38 * ARGUMENTS:
39 * Irp = The IRP to set
40 * RETURNS: TRUE if top level was null, else FALSE
41 */
42 BOOLEAN
43 NtfsIsIrpTopLevel(PIRP Irp)
44 {
45 BOOLEAN ReturnCode = FALSE;
46
47 TRACE_(NTFS, "NtfsIsIrpTopLevel()\n");
48
49 if (IoGetTopLevelIrp() == NULL)
50 {
51 IoSetTopLevelIrp(Irp);
52 ReturnCode = TRUE;
53 }
54
55 return ReturnCode;
56 }
57
58 /*
59 * FUNCTION: Allocate and fill an NTFS_IRP_CONTEXT struct in order to use it for IRP
60 * ARGUMENTS:
61 * DeviceObject = Used to fill in struct
62 * Irp = The IRP that need IRP_CONTEXT struct
63 * RETURNS: NULL or PNTFS_IRP_CONTEXT
64 */
65 PNTFS_IRP_CONTEXT
66 NtfsAllocateIrpContext(PDEVICE_OBJECT DeviceObject,
67 PIRP Irp)
68 {
69 PNTFS_IRP_CONTEXT IrpContext;
70 PIO_STACK_LOCATION IoStackLocation;
71
72 TRACE_(NTFS, "NtfsAllocateIrpContext()\n");
73
74 IrpContext = (PNTFS_IRP_CONTEXT)ExAllocatePoolWithTag(NonPagedPool,
75 sizeof(NTFS_IRP_CONTEXT),
76 'PRIN');
77 if (IrpContext == NULL)
78 return NULL;
79
80 RtlZeroMemory(IrpContext, sizeof(NTFS_IRP_CONTEXT));
81
82 IrpContext->Identifier.Type = NTFS_TYPE_IRP_CONTEST;
83 IrpContext->Identifier.Size = sizeof(NTFS_IRP_CONTEXT);
84 IrpContext->Irp = Irp;
85 IrpContext->DeviceObject = DeviceObject;
86
87 if (Irp)
88 {
89 IoStackLocation = IoGetCurrentIrpStackLocation(Irp);
90 ASSERT(IoStackLocation);
91
92 IrpContext->MajorFunction = IoStackLocation->MajorFunction;
93 IrpContext->MinorFunction = IoStackLocation->MinorFunction;
94 IrpContext->IsTopLevel = (IoGetTopLevelIrp() == Irp);
95 }
96
97 return IrpContext;
98 }
99
100 /* EOF */