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ntoskrnl: Use the MDL allocation routines for standard ioctl processing.

This commit is contained in:
Alexandre Julliard 2015-03-04 22:45:06 +09:00
parent 5fc369ff21
commit 1895a42509
2 changed files with 36 additions and 22 deletions
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56
dlls/ntoskrnl.exe/ntoskrnl.c
View File

@ -140,7 +140,6 @@ static HANDLE get_device_manager(void)
static NTSTATUS process_ioctl( DEVICE_OBJECT *device, ULONG code, void *in_buff, ULONG in_size,
void *out_buff, ULONG *out_size )
{
MDL mdl;
IRP *irp;
void *sys_buff = NULL;
FILE_OBJECT file;
@ -150,7 +149,6 @@ static NTSTATUS process_ioctl( DEVICE_OBJECT *device, ULONG code, void *in_buff,
TRACE( "ioctl %x device %p in_size %u out_size %u\n", code, device, in_size, *out_size );
/* so we can spot things that we should initialize */
memset( &mdl, 0x77, sizeof(mdl) );
memset( &file, 0x88, sizeof(file) );
if ((code & 3) == METHOD_BUFFERED)
@ -170,18 +168,13 @@ static NTSTATUS process_ioctl( DEVICE_OBJECT *device, ULONG code, void *in_buff,
irp->RequestorMode = UserMode;
irp->AssociatedIrp.SystemBuffer = ((code & 3) == METHOD_BUFFERED) ? sys_buff : in_buff;
irp->UserBuffer = out_buff;
irp->MdlAddress = &mdl;
irp->Tail.Overlay.OriginalFileObject = &file;
mdl.Next = NULL;
mdl.Size = 0;
mdl.StartVa = out_buff;
mdl.ByteCount = *out_size;
mdl.ByteOffset = 0;
file.FsContext = NULL;
file.FsContext2 = NULL;
IoAllocateMdl( out_buff, *out_size, FALSE, FALSE, irp );
device->CurrentIrp = irp;
KeQueryTickCount( &count ); /* update the global KeTickCount */
@ -385,8 +378,18 @@ PIRP WINAPI IoAllocateIrp( CCHAR stack_size, BOOLEAN charge_quota )
*/
void WINAPI IoFreeIrp( IRP *irp )
{
MDL *mdl;
TRACE( "%p\n", irp );
mdl = irp->MdlAddress;
while (mdl)
{
MDL *next = mdl->Next;
IoFreeMdl( mdl );
mdl = next;
}
ExFreePool( irp );
}
@ -404,24 +407,21 @@ PVOID WINAPI IoAllocateErrorLogEntry( PVOID IoObject, UCHAR EntrySize )
/***********************************************************************
* IoAllocateMdl (NTOSKRNL.EXE.@)
*/
PMDL WINAPI IoAllocateMdl( PVOID VirtualAddress, ULONG Length, BOOLEAN SecondaryBuffer, BOOLEAN ChargeQuota, PIRP Irp )
PMDL WINAPI IoAllocateMdl( PVOID va, ULONG length, BOOLEAN secondary, BOOLEAN charge_quota, IRP *irp )
{
PMDL mdl;
ULONG_PTR address = (ULONG_PTR)VirtualAddress;
ULONG_PTR address = (ULONG_PTR)va;
ULONG_PTR page_address;
SIZE_T nb_pages, mdl_size;
TRACE("(%p, %u, %i, %i, %p)\n", VirtualAddress, Length, SecondaryBuffer, ChargeQuota, Irp);
TRACE("(%p, %u, %i, %i, %p)\n", va, length, secondary, charge_quota, irp);
if (Irp)
FIXME("Attaching the MDL to an IRP is not yet supported\n");
if (ChargeQuota)
if (charge_quota)
FIXME("Charge quota is not yet supported\n");
/* FIXME: We suppose that page size is 4096 */
page_address = address & ~(4096 - 1);
nb_pages = (((address + Length - 1) & ~(4096 - 1)) - page_address) / 4096 + 1;
nb_pages = (((address + length - 1) & ~(4096 - 1)) - page_address) / 4096 + 1;
mdl_size = sizeof(MDL) + nb_pages * sizeof(PVOID);
@ -430,11 +430,24 @@ PMDL WINAPI IoAllocateMdl( PVOID VirtualAddress, ULONG Length, BOOLEAN Secondary
return NULL;
mdl->Size = mdl_size;
mdl->Process = IoGetCurrentProcess();
mdl->Process = NULL; /* FIXME: IoGetCurrentProcess */
mdl->StartVa = (PVOID)page_address;
mdl->ByteCount = Length;
mdl->ByteCount = length;
mdl->ByteOffset = address - page_address;
if (!irp) return mdl;
if (secondary) /* add it at the end */
{
MDL **pmdl = &irp->MdlAddress;
while (*pmdl) pmdl = &(*pmdl)->Next;
*pmdl = mdl;
}
else
{
mdl->Next = irp->MdlAddress;
irp->MdlAddress = mdl;
}
return mdl;
}
@ -442,10 +455,9 @@ PMDL WINAPI IoAllocateMdl( PVOID VirtualAddress, ULONG Length, BOOLEAN Secondary
/***********************************************************************
* IoFreeMdl (NTOSKRNL.EXE.@)
*/
VOID WINAPI IoFreeMdl(PMDL mdl)
void WINAPI IoFreeMdl(PMDL mdl)
{
FIXME("partial stub: %p\n", mdl);
TRACE("%p\n", mdl);
HeapFree(GetProcessHeap(), 0, mdl);
}

2
include/ddk/wdm.h
View File

@ -1199,6 +1199,7 @@ void WINAPI ExFreePoolWithTag(PVOID,ULONG);
NTSTATUS WINAPI IoAllocateDriverObjectExtension(PDRIVER_OBJECT,PVOID,ULONG,PVOID*);
PVOID WINAPI IoAllocateErrorLogEntry(PVOID,UCHAR);
PIRP WINAPI IoAllocateIrp(CCHAR,BOOLEAN);
PMDL WINAPI IoAllocateMdl(PVOID,ULONG,BOOLEAN,BOOLEAN,IRP*);
PIRP WINAPI IoBuildDeviceIoControlRequest(ULONG,DEVICE_OBJECT*,PVOID,ULONG,PVOID,ULONG,BOOLEAN,PKEVENT,IO_STATUS_BLOCK*);
NTSTATUS WINAPI IoCallDriver(DEVICE_OBJECT*,IRP*);
VOID WINAPI IoCompleteRequest(IRP*,UCHAR);
@ -1209,6 +1210,7 @@ void WINAPI IoDeleteDevice(DEVICE_OBJECT*);
void WINAPI IoDeleteDriver(DRIVER_OBJECT*);
NTSTATUS WINAPI IoDeleteSymbolicLink(UNICODE_STRING*);
void WINAPI IoFreeIrp(IRP*);
void WINAPI IoFreeMdl(MDL*);
PEPROCESS WINAPI IoGetCurrentProcess(void);
NTSTATUS WINAPI IoGetDeviceInterfaces(const GUID*,PDEVICE_OBJECT,ULONG,PWSTR*);
NTSTATUS WINAPI IoGetDeviceObjectPointer(UNICODE_STRING*,ACCESS_MASK,PFILE_OBJECT*,PDEVICE_OBJECT*);