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If device instance id is not unique, prepend information from parent bus device

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svn path=/trunk/; revision=18025
This commit is contained in:
Hervé Poussineau 2005-09-24 13:19:25 +00:00
parent bd79c96a7d
commit 5681e54736
1 changed files with 72 additions and 14 deletions
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86
reactos/ntoskrnl/io/pnpmgr.c
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@ -1294,6 +1294,7 @@ IopActionInterrogateDeviceStack(
HANDLE InstanceKey = NULL;
UNICODE_STRING ValueName;
DEVICE_CAPABILITIES DeviceCapabilities;
PKEY_VALUE_PARTIAL_INFORMATION ParentPrefixIdInformation = NULL;
DPRINT("IopActionInterrogateDeviceStack(%p, %p)\n", DeviceNode, Context);
DPRINT("PDO 0x%p\n", DeviceNode->PhysicalDeviceObject);
@ -1351,6 +1352,69 @@ IopActionInterrogateDeviceStack(
DPRINT("IopInitiatePnpIrp() failed (Status %x)\n", Status);
}
DPRINT("Sending IRP_MN_QUERY_CAPABILITIES to device stack\n");
Status = IopQueryDeviceCapabilities(DeviceNode, &DeviceCapabilities);
if (!NT_SUCCESS(Status))
{
DPRINT("IopInitiatePnpIrp() failed (Status 0x%08lx)\n", Status);
}
DeviceNode->CapabilityFlags = *(PULONG)((ULONG_PTR)&DeviceCapabilities + 4);
if (!DeviceCapabilities.UniqueID)
{
/* Device has not a unique ID. We need to prepend parent bus unique identifier */
DPRINT("Instance ID is not unique\n");
if (DeviceNode->Parent->InstancePath.Length > 0)
{
/* Parent device node exists */
HANDLE hKey;
OBJECT_ATTRIBUTES ObjectAttributes;
UNICODE_STRING KeyName;
ULONG KeyNameBufferLength;
PWSTR KeyNameBuffer = NULL;
KeyNameBufferLength = FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data[0]) + MAX_PATH * sizeof(WCHAR);
ParentPrefixIdInformation = ExAllocatePool(PagedPool, KeyNameBufferLength + sizeof(WCHAR));
KeyNameBuffer = ExAllocatePool(PagedPool, (49 * sizeof(WCHAR)) + DeviceNode->Parent->InstancePath.Length);
if (ParentPrefixIdInformation && KeyNameBuffer)
{
/* Memory is allocated, let's try to read registry settings */
wcscpy(KeyNameBuffer, L"\\Registry\\Machine\\System\\CurrentControlSet\\Enum\\");
wcscat(KeyNameBuffer, DeviceNode->Parent->InstancePath.Buffer);
RtlInitUnicodeString(&KeyName, KeyNameBuffer);
InitializeObjectAttributes(&ObjectAttributes, &KeyName, OBJ_CASE_INSENSITIVE | OBJ_KERNEL_HANDLE, NULL, NULL);
Status = ZwOpenKey(&hKey, KEY_READ, &ObjectAttributes);
if (NT_SUCCESS(Status))
{
RtlInitUnicodeString(&ValueName, L"ParentIdPrefix");
Status = ZwQueryValueKey(
hKey, &ValueName,
KeyValuePartialInformation, ParentPrefixIdInformation,
KeyNameBufferLength, &KeyNameBufferLength);
if (NT_SUCCESS(Status))
{
/* NULL-terminate the string, as we have allocated enough place for it */
((PWSTR)ParentPrefixIdInformation->Data)[ParentPrefixIdInformation->DataLength / sizeof(WCHAR)] = 0;
}
else
{
ExFreePool(ParentPrefixIdInformation);
ParentPrefixIdInformation = NULL;
}
ZwClose(hKey);
}
else
{
ExFreePool(ParentPrefixIdInformation);
ParentPrefixIdInformation = NULL;
}
}
ExFreePool(KeyNameBuffer);
}
}
DPRINT("Sending IRP_MN_QUERY_ID.BusQueryInstanceID to device stack\n");
Stack.Parameters.QueryId.IdType = BusQueryInstanceID;
@ -1363,6 +1427,13 @@ IopActionInterrogateDeviceStack(
{
/* Append the instance id string */
wcscat(InstancePath, L"\\");
if (ParentPrefixIdInformation && ParentPrefixIdInformation->Type == REG_SZ)
{
/* Add information from parent bus device to InstancePath */
wcscat(InstancePath, (PWSTR)ParentPrefixIdInformation->Data);
if (*(PWSTR)IoStatusBlock.Information)
wcscat(InstancePath, L"&");
}
wcscat(InstancePath, (PWSTR)IoStatusBlock.Information);
/*
@ -1374,20 +1445,7 @@ IopActionInterrogateDeviceStack(
{
DPRINT("IopInitiatePnpIrp() failed (Status %x)\n", Status);
}
Status = IopQueryDeviceCapabilities(DeviceNode, &DeviceCapabilities);
if (!NT_SUCCESS(Status))
{
DPRINT("IopInitiatePnpIrp() failed (Status 0x%08lx)\n", Status);
}
DeviceNode->CapabilityFlags = *(PULONG)((ULONG_PTR)&DeviceCapabilities + 4);
if (!DeviceCapabilities.UniqueID)
{
DPRINT("Instance ID is not unique\n");
/* FIXME: Add information from parent bus driver to InstancePath */
}
ExFreePool(ParentPrefixIdInformation);
if (!RtlCreateUnicodeString(&DeviceNode->InstancePath, InstancePath))
{