3 * Copyright (C) 2008 ReactOS Team
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.
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.
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.
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
27 /* INCLUDES *****************************************************************/
34 /* GLOBALS *****************************************************************/
37 /* FUNCTIONS ****************************************************************/
40 * FUNCTION: Used with IRP to set them to TopLevelIrp field
42 * Irp = The IRP to set
43 * RETURNS: TRUE if top level was null, else FALSE
46 NtfsIsIrpTopLevel(PIRP Irp
)
48 BOOLEAN ReturnCode
= FALSE
;
50 TRACE_(NTFS
, "NtfsIsIrpTopLevel()\n");
52 if (IoGetTopLevelIrp() == NULL
)
54 IoSetTopLevelIrp(Irp
);
62 * FUNCTION: Allocate and fill an NTFS_IRP_CONTEXT struct in order to use it for IRP
64 * DeviceObject = Used to fill in struct
65 * Irp = The IRP that need IRP_CONTEXT struct
66 * RETURNS: NULL or PNTFS_IRP_CONTEXT
69 NtfsAllocateIrpContext(PDEVICE_OBJECT DeviceObject
,
72 PNTFS_IRP_CONTEXT IrpContext
;
73 PIO_STACK_LOCATION IoStackLocation
;
75 TRACE_(NTFS
, "NtfsAllocateIrpContext()\n");
77 IrpContext
= (PNTFS_IRP_CONTEXT
)ExAllocatePoolWithTag(NonPagedPool
,
78 sizeof(NTFS_IRP_CONTEXT
),
80 if (IrpContext
== NULL
)
83 RtlZeroMemory(IrpContext
, sizeof(NTFS_IRP_CONTEXT
));
85 IrpContext
->Identifier
.Type
= NTFS_TYPE_IRP_CONTEST
;
86 IrpContext
->Identifier
.Size
= sizeof(NTFS_IRP_CONTEXT
);
87 IrpContext
->Irp
= Irp
;
88 IrpContext
->DeviceObject
= DeviceObject
;
92 IoStackLocation
= IoGetCurrentIrpStackLocation(Irp
);
93 ASSERT(IoStackLocation
);
95 IrpContext
->MajorFunction
= IoStackLocation
->MajorFunction
;
96 IrpContext
->MinorFunction
= IoStackLocation
->MinorFunction
;
97 IrpContext
->IsTopLevel
= (IoGetTopLevelIrp() == Irp
);