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[NTOS:PNP]
- Move generation of the device instance path into its own function svn path=/trunk/; revision=74024
This commit is contained in:
Thomas Faber
parent
ebc3d8bfbc
commit
240072132d
1 changed files with 127 additions and 108 deletions
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@ -1847,6 +1847,128 @@ IopQueryCompatibleIds(PDEVICE_NODE DeviceNode,
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return Status;
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}
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NTSTATUS
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IopCreateDeviceInstancePath(
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_In_ PDEVICE_NODE DeviceNode,
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_Out_ PUNICODE_STRING InstancePathU)
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{
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IO_STATUS_BLOCK IoStatusBlock;
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PWSTR InformationString;
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WCHAR InstancePath[MAX_PATH];
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IO_STACK_LOCATION Stack;
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NTSTATUS Status;
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UNICODE_STRING ParentIdPrefix = { 0, 0, NULL };
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DEVICE_CAPABILITIES DeviceCapabilities;
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DPRINT("Sending IRP_MN_QUERY_ID.BusQueryDeviceID to device stack\n");
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Stack.Parameters.QueryId.IdType = BusQueryDeviceID;
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Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
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&IoStatusBlock,
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IRP_MN_QUERY_ID,
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&Stack);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("IopInitiatePnpIrp() failed (Status %x)\n", Status);
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return Status;
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}
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/* Copy the device id string */
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InformationString = (PWSTR)IoStatusBlock.Information;
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wcscpy(InstancePath, InformationString);
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/*
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* FIXME: Check for valid characters, if there is invalid characters
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* then bugcheck.
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*/
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ExFreePoolWithTag(InformationString, 0);
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DPRINT("Sending IRP_MN_QUERY_CAPABILITIES to device stack (after enumeration)\n");
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Status = IopQueryDeviceCapabilities(DeviceNode, &DeviceCapabilities);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("IopInitiatePnpIrp() failed (Status 0x%08lx)\n", Status);
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return Status;
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}
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/* This bit is only check after enumeration */
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if (DeviceCapabilities.HardwareDisabled)
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{
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/* FIXME: Cleanup device */
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DeviceNode->Flags |= DNF_DISABLED;
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return STATUS_PLUGPLAY_NO_DEVICE;
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}
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else
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{
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DeviceNode->Flags &= ~DNF_DISABLED;
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}
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if (!DeviceCapabilities.UniqueID)
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{
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/* Device has not a unique ID. We need to prepend parent bus unique identifier */
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DPRINT("Instance ID is not unique\n");
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Status = IopGetParentIdPrefix(DeviceNode, &ParentIdPrefix);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("IopGetParentIdPrefix() failed (Status 0x%08lx)\n", Status);
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return Status;
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}
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}
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DPRINT("Sending IRP_MN_QUERY_ID.BusQueryInstanceID to device stack\n");
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Stack.Parameters.QueryId.IdType = BusQueryInstanceID;
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Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
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&IoStatusBlock,
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IRP_MN_QUERY_ID,
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&Stack);
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if (NT_SUCCESS(Status))
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{
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InformationString = (PWSTR)IoStatusBlock.Information;
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/* Append the instance id string */
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wcscat(InstancePath, L"\\");
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if (ParentIdPrefix.Length > 0)
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{
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/* Add information from parent bus device to InstancePath */
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wcscat(InstancePath, ParentIdPrefix.Buffer);
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if (InformationString && *InformationString)
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{
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wcscat(InstancePath, L"&");
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}
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}
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if (InformationString)
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{
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wcscat(InstancePath, InformationString);
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}
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/*
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* FIXME: Check for valid characters, if there is invalid characters
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* then bugcheck
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*/
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if (InformationString)
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{
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ExFreePoolWithTag(InformationString, 0);
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}
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}
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else
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{
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DPRINT("IopInitiatePnpIrp() failed (Status %x)\n", Status);
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}
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RtlFreeUnicodeString(&ParentIdPrefix);
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if (!RtlCreateUnicodeString(InstancePathU, InstancePath))
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{
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DPRINT1("RtlCreateUnicodeString failed\n");
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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return STATUS_SUCCESS;
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}
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/*
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* IopActionInterrogateDeviceStack
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@ -1871,16 +1993,13 @@ IopActionInterrogateDeviceStack(PDEVICE_NODE DeviceNode,
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IO_STATUS_BLOCK IoStatusBlock;
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PWSTR InformationString;
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PDEVICE_NODE ParentDeviceNode;
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WCHAR InstancePath[MAX_PATH];
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IO_STACK_LOCATION Stack;
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NTSTATUS Status;
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ULONG RequiredLength;
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LCID LocaleId;
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HANDLE InstanceKey = NULL;
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UNICODE_STRING ValueName;
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UNICODE_STRING ParentIdPrefix = { 0, 0, NULL };
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UNICODE_STRING InstancePathU;
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DEVICE_CAPABILITIES DeviceCapabilities;
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PDEVICE_OBJECT OldDeviceObject;
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DPRINT("IopActionInterrogateDeviceStack(%p, %p)\n", DeviceNode, Context);
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@ -1928,118 +2047,18 @@ IopActionInterrogateDeviceStack(PDEVICE_NODE DeviceNode,
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* return STATUS_SUCCESS.
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*/
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DPRINT("Sending IRP_MN_QUERY_ID.BusQueryDeviceID to device stack\n");
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Stack.Parameters.QueryId.IdType = BusQueryDeviceID;
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Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
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&IoStatusBlock,
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IRP_MN_QUERY_ID,
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&Stack);
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Status = IopCreateDeviceInstancePath(DeviceNode, &InstancePathU);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("IopInitiatePnpIrp() failed (Status %x)\n", Status);
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if (Status != STATUS_PLUGPLAY_NO_DEVICE)
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{
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DPRINT1("IopCreateDeviceInstancePath() failed with status 0x%lx\n", Status);
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}
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/* We have to return success otherwise we abort the traverse operation */
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return STATUS_SUCCESS;
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}
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/* Copy the device id string */
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InformationString = (PWSTR)IoStatusBlock.Information;
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wcscpy(InstancePath, InformationString);
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/*
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* FIXME: Check for valid characters, if there is invalid characters
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* then bugcheck.
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*/
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ExFreePoolWithTag(InformationString, 0);
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DPRINT("Sending IRP_MN_QUERY_CAPABILITIES to device stack (after enumeration)\n");
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Status = IopQueryDeviceCapabilities(DeviceNode, &DeviceCapabilities);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("IopInitiatePnpIrp() failed (Status 0x%08lx)\n", Status);
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/* We have to return success otherwise we abort the traverse operation */
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return STATUS_SUCCESS;
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}
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/* This bit is only check after enumeration */
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if (DeviceCapabilities.HardwareDisabled)
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{
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/* FIXME: Cleanup device */
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DeviceNode->Flags |= DNF_DISABLED;
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return STATUS_SUCCESS;
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}
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else
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{
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DeviceNode->Flags &= ~DNF_DISABLED;
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}
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if (!DeviceCapabilities.UniqueID)
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{
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/* Device has not a unique ID. We need to prepend parent bus unique identifier */
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DPRINT("Instance ID is not unique\n");
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Status = IopGetParentIdPrefix(DeviceNode, &ParentIdPrefix);
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if (!NT_SUCCESS(Status))
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{
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DPRINT1("IopGetParentIdPrefix() failed (Status 0x%08lx)\n", Status);
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/* We have to return success otherwise we abort the traverse operation */
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return STATUS_SUCCESS;
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}
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}
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DPRINT("Sending IRP_MN_QUERY_ID.BusQueryInstanceID to device stack\n");
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Stack.Parameters.QueryId.IdType = BusQueryInstanceID;
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Status = IopInitiatePnpIrp(DeviceNode->PhysicalDeviceObject,
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&IoStatusBlock,
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IRP_MN_QUERY_ID,
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&Stack);
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if (NT_SUCCESS(Status))
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{
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InformationString = (PWSTR)IoStatusBlock.Information;
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/* Append the instance id string */
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wcscat(InstancePath, L"\\");
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if (ParentIdPrefix.Length > 0)
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{
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/* Add information from parent bus device to InstancePath */
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wcscat(InstancePath, ParentIdPrefix.Buffer);
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if (InformationString && *InformationString)
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{
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wcscat(InstancePath, L"&");
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}
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}
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if (InformationString)
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{
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wcscat(InstancePath, InformationString);
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}
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/*
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* FIXME: Check for valid characters, if there is invalid characters
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* then bugcheck
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*/
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if (InformationString)
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{
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ExFreePoolWithTag(InformationString, 0);
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}
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}
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else
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{
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DPRINT("IopInitiatePnpIrp() failed (Status %x)\n", Status);
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}
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RtlFreeUnicodeString(&ParentIdPrefix);
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if (!RtlCreateUnicodeString(&InstancePathU, InstancePath))
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{
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DPRINT("No resources\n");
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/* FIXME: Cleanup and disable device */
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}
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/* Verify that this is not a duplicate */
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OldDeviceObject = IopGetDeviceObjectFromDeviceInstance(&InstancePathU);
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if (OldDeviceObject != NULL)
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