mirror of
https://github.com/reactos/reactos.git
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133 lines
4 KiB
C
133 lines
4 KiB
C
/*
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* ReactOS kernel
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* Copyright (C) 2008, 2014 ReactOS Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS kernel
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* FILE: drivers/filesystem/ntfs/misc.c
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* PURPOSE: NTFS filesystem driver
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* PROGRAMMER: Pierre Schweitzer
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* UPDATE HISTORY:
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*/
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/* INCLUDES *****************************************************************/
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#include "ntfs.h"
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#define NDEBUG
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#include <debug.h>
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/* FUNCTIONS ****************************************************************/
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/*
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* FUNCTION: Used with IRP to set them to TopLevelIrp field
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* ARGUMENTS:
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* Irp = The IRP to set
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* RETURNS: TRUE if top level was null, else FALSE
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*/
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BOOLEAN
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NtfsIsIrpTopLevel(PIRP Irp)
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{
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BOOLEAN ReturnCode = FALSE;
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TRACE_(NTFS, "NtfsIsIrpTopLevel()\n");
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if (IoGetTopLevelIrp() == NULL)
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{
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IoSetTopLevelIrp(Irp);
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ReturnCode = TRUE;
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}
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return ReturnCode;
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}
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/*
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* FUNCTION: Allocate and fill an NTFS_IRP_CONTEXT struct in order to use it for IRP
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* ARGUMENTS:
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* DeviceObject = Used to fill in struct
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* Irp = The IRP that need IRP_CONTEXT struct
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* RETURNS: NULL or PNTFS_IRP_CONTEXT
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*/
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PNTFS_IRP_CONTEXT
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NtfsAllocateIrpContext(PDEVICE_OBJECT DeviceObject,
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PIRP Irp)
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{
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PNTFS_IRP_CONTEXT IrpContext;
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TRACE_(NTFS, "NtfsAllocateIrpContext()\n");
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IrpContext = (PNTFS_IRP_CONTEXT)ExAllocateFromNPagedLookasideList(&NtfsGlobalData->IrpContextLookasideList);
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if (IrpContext == NULL)
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return NULL;
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RtlZeroMemory(IrpContext, sizeof(NTFS_IRP_CONTEXT));
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IrpContext->Identifier.Type = NTFS_TYPE_IRP_CONTEXT;
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IrpContext->Identifier.Size = sizeof(NTFS_IRP_CONTEXT);
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IrpContext->Irp = Irp;
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IrpContext->DeviceObject = DeviceObject;
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IrpContext->Stack = IoGetCurrentIrpStackLocation(Irp);
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IrpContext->MajorFunction = IrpContext->Stack->MajorFunction;
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IrpContext->MinorFunction = IrpContext->Stack->MinorFunction;
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IrpContext->FileObject = IrpContext->Stack->FileObject;
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IrpContext->IsTopLevel = (IoGetTopLevelIrp() == Irp);
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IrpContext->PriorityBoost = IO_NO_INCREMENT;
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IrpContext->Flags = IRPCONTEXT_COMPLETE;
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if (IrpContext->MajorFunction == IRP_MJ_FILE_SYSTEM_CONTROL ||
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IrpContext->MajorFunction == IRP_MJ_DEVICE_CONTROL ||
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IrpContext->MajorFunction == IRP_MJ_SHUTDOWN ||
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(IrpContext->MajorFunction != IRP_MJ_CLEANUP &&
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IrpContext->MajorFunction != IRP_MJ_CLOSE &&
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IoIsOperationSynchronous(Irp)))
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{
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IrpContext->Flags |= IRPCONTEXT_CANWAIT;
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}
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return IrpContext;
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}
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VOID
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NtfsFileFlagsToAttributes(ULONG NtfsAttributes,
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PULONG FileAttributes)
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{
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*FileAttributes = NtfsAttributes;
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if ((NtfsAttributes & NTFS_FILE_TYPE_DIRECTORY) == NTFS_FILE_TYPE_DIRECTORY)
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{
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*FileAttributes = NtfsAttributes & ~NTFS_FILE_TYPE_DIRECTORY;
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*FileAttributes |= FILE_ATTRIBUTE_DIRECTORY;
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}
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if (NtfsAttributes == 0)
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*FileAttributes = FILE_ATTRIBUTE_NORMAL;
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}
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PVOID
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NtfsGetUserBuffer(PIRP Irp,
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BOOLEAN Paging)
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{
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if (Irp->MdlAddress != NULL)
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{
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return MmGetSystemAddressForMdlSafe(Irp->MdlAddress, (Paging ? HighPagePriority : NormalPagePriority));
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}
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else
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{
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return Irp->UserBuffer;
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}
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}
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/* EOF */
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