自己构造 Create IRP

NTSTATUS IrpCreate(IN PUNICODE_STRING Name,IN ACCESS_MASK DesiredAccess,IN ULONG FileAttributes,IN ULONG ShareAccess,IN ULONG CreateDisposition,IN ULONG CreateOptions,IN PDEVICE_OBJECT DeviceObject,IN PDEVICE_OBJECT RealDevice,IN PFILE_OBJECT RelatedFileObject,OUT PHANDLE ReturnHandle,PVOID* ReturnObject) i慱(鏈?=  
{ 保 At??? 
     NTSTATUS Status; ㄥ犗I$毱碽  
     KEVENT Event; <%韒?荦? 
     PIRP pIrp; 詥 8A?f薗  
     PFILE_OBJECT FileObject; is嬆鰑脷q  
     IO_STATUS_BLOCK      IoStatusBlock; >{?nK?E9  
     PIO_STACK_LOCATION IOStack; '篲??c靯  
     IO_SECURITY_CONTEXT IoSecurityContext; =&4b襷?  
     ACCESS_STATE AccessState; m浖傼Q~?? 
     AUX_DATA AuxData; ??踛襔蹬  
     PGENERIC_MAPPING pGenericMapping; ?嚜3J聜  
     OBJECT_ATTRIBUTES ObjectAttributs; ?汏??? 
      壞hX@c腺? 
     KeInitializeEvent(&Event,SynchronizationEvent,FALSE); 霷[d?4?  
     pIrp = IoAllocateIrp(DeviceObject->StackSize,FALSE); ?袕?仴 Q  
     if(pIrp==NULL)return STATUS_INSUFFICIENT_RESOURCES; 貥浻芅?lt;? 
     InitializeObjectAttributes(&ObjectAttributs,NULL,OBJ_CASE_INSENSITIVE,0,NULL); 圝| ?投yM  
     Status = ObCreateObject(KernelMode,*IoFileObjectType,&ObjectAttributs,KernelMode,NULL,sizeof(FILE_OBJECT),0,0,(PVOID*)&FileObject); 麁氾C洌y? 
     if(!NT_SUCCESS(Status)) 蚹0u?'?^  
     { ?汗?? 
           IoFreeIrp(pIrp); &樎p赯Y?  
           return Status; v究Ky薹9  
     } K筍W"?~  
     memset(FileObject,0,sizeof(FILE_OBJECT)); 碹?乿耚xq  
     FileObject->Type=5; ぜH"Y?"€@? 
     FileObject->Size=sizeof(FILE_OBJECT); 玬=涛w椁鼊  
     FileObject->Flags=FO_SYNCHRONOUS_IO; lp陀醃噻?  
     FileObject->DeviceObject = RealDevice; nD?Y摎躱  
     FileObject->RelatedFileObject = RelatedFileObject; 6b暋撰菩#  
     KeInitializeEvent(&FileObject->Lock,SynchronizationEvent,FALSE); y娍 ?[? 
     KeInitializeEvent(&FileObject->Event,SynchronizationEvent,FALSE); 8Y捛+湏驺  
     FileObject->FileName.Buffer = (PWSTR)ExAllocatePool(NonPagedPool,Name->MaximumLength); j?垡忂碸;  
     RtlCopyUnicodeString(&FileObject->FileName,Name); 氼hG^睒&? 
     pIrp->UserEvent=&Event; 0u%  
     pIrp->UserIosb=&IoStatusBlock; ?nm猪?B? 
     pIrp->Tail.Overlay.Thread = (PETHREAD)KeGetCurrentThread(); 蚿a儚?註  
     pIrp->Tail.Overlay.OriginalFileObject=FileObject; Pl6}?墨? 
     pIrp->RequestorMode=KernelMode; 辑P鋜 ab  
     pIrp->Flags=IRP_CREATE_OPERATION|IRP_SYNCHRONOUS_API; 弢MFX?鼏  
     pIrp->PendingReturned=FALSE; s?猙幙糁  
     pIrp->Cancel=FALSE; 觥孛麛郩｛  
     pIrp->MdlAddress=NULL; l湨 2圐紃? 
     pIrp->CancelRoutine=NULL; 妴覆^'罌? 
     pIrp->Tail.Overlay.AuxiliaryBuffer=NULL; €(+l珦|ml? 
     IOStack = IoGetNextIrpStackLocation(pIrp); 寫孠袇 r? 
     IOStack->MajorFunction=IRP_MJ_CREATE; 菃,G?|  
     IOStack->DeviceObject=DeviceObject; _:?$|Y瓔? 
     IOStack->FileObject=FileObject; 奘T?擁?? 
     pGenericMapping = IoGetFileObjectGenericMapping(); 椒|p饒#c  
     SeCreateAccessState(&AccessState,&AuxData,DesiredAccess,pGenericMapping); -?聗H?? 
     IoSecurityContext.AccessState = &AccessState; ?C憃師?? 
     IoSecurityContext.DesiredAccess = DesiredAccess; 濾e沫惙%m|  
     IoSecurityContext.SecurityQos=NULL; h笴铅? /Q  
     IoSecurityContext.FullCreateOptions=0; 廿鈖O@k?#  
     IOStack->Parameters.Create.SecurityContext=&IoSecurityContext; 焬?xA丮  
     IOStack->Parameters.Create.Options=(CreateDisposition<<0x18)|CreateOptions; ?窜К焣瞣  
     IOStack->Parameters.Create.FileAttributes = (USHORT)FileAttributes; 芿?惸哑v  
     IOStack->Parameters.Create.ShareAccess = (USHORT)ShareAccess; ll€鸌1篢u? 
     IOStack->Parameters.Create.EaLength=0; 厂雘T錛塏  
     IOStack->Context=NULL; 
??滔  
     IOStack->Control=SL_INVOKE_ON_CANCEL|SL_INVOKE_ON_SUCCESS|SL_INVOKE_ON_ERROR; ^4?連燃  
     IOStack->CompletionRoutine = IoCompletionRoutine; 墢gmr %U? 
     Status = IoCallDriver(DeviceObject,pIrp); 5娩樼g^辺? 
     if(Status == STATUS_PENDING) 猷.餾? ? 
           KeWaitForSingleObject(&Event,Executive,KernelMode,FALSE,NULL); r倬畛=?? 
     Status=IoStatusBlock.Status; C垘*労置}? 
     if(NT_SUCCESS(Status)) e.I餃ft  
     { #OK?e? 
           MyReferenceObject(FileObject); ?yX矯@?b  
     } 炆恤嵐w? 
     return Status; ??奼齓锓  
} ˊ胧lER筬S  
齲龟??  
void MyReferenceObject(PFILE_OBJECT FileObject) 狾敽>V -  
{ 洛 /禭  
     InterlockedIncrement(&FileObject->DeviceObject->ReferenceCount); ?枆楺J蚤  
     if(FileObject->Vpb) EV脭堓  
           InterlockedIncrement((volatile LONG*)&FileObject->Vpb->ReferenceCount); Q^堁? 彀Q  
}