mirror of
https://github.com/reactos/reactos.git
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392 lines
12 KiB
C
392 lines
12 KiB
C
/*
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* PROJECT: ReactOS Kernel
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* COPYRIGHT: GPL - See COPYING in the top level directory
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* FILE: ntoskrnl/io/pnpmgr/pnpnotify.c
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* PURPOSE: Plug & Play notification functions
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* PROGRAMMERS: Filip Navara (xnavara@volny.cz)
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* Hervé Poussineau (hpoussin@reactos.org)
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* Pierre Schweitzer
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*/
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/* INCLUDES ******************************************************************/
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#include <ntoskrnl.h>
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#define NDEBUG
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#include <debug.h>
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/* TYPES *******************************************************************/
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typedef struct _PNP_NOTIFY_ENTRY
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{
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LIST_ENTRY PnpNotifyList;
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IO_NOTIFICATION_EVENT_CATEGORY EventCategory;
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PVOID Context;
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UNICODE_STRING Guid;
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PFILE_OBJECT FileObject;
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PDRIVER_OBJECT DriverObject;
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PDRIVER_NOTIFICATION_CALLBACK_ROUTINE PnpNotificationProc;
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} PNP_NOTIFY_ENTRY, *PPNP_NOTIFY_ENTRY;
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KGUARDED_MUTEX PnpNotifyListLock;
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LIST_ENTRY PnpNotifyListHead;
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/* FUNCTIONS *****************************************************************/
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VOID
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IopNotifyPlugPlayNotification(
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IN PDEVICE_OBJECT DeviceObject,
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IN IO_NOTIFICATION_EVENT_CATEGORY EventCategory,
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IN LPCGUID Event,
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IN PVOID EventCategoryData1,
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IN PVOID EventCategoryData2)
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{
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PPNP_NOTIFY_ENTRY ChangeEntry;
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PLIST_ENTRY ListEntry;
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PVOID NotificationStructure;
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BOOLEAN CallCurrentEntry;
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UNICODE_STRING GuidString;
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NTSTATUS Status;
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PDEVICE_OBJECT EntryDeviceObject = NULL;
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ASSERT(DeviceObject);
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KeAcquireGuardedMutex(&PnpNotifyListLock);
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if (IsListEmpty(&PnpNotifyListHead))
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{
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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return;
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}
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switch (EventCategory)
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{
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case EventCategoryDeviceInterfaceChange:
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{
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PDEVICE_INTERFACE_CHANGE_NOTIFICATION NotificationInfos;
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NotificationStructure = NotificationInfos = ExAllocatePoolWithTag(
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PagedPool,
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sizeof(DEVICE_INTERFACE_CHANGE_NOTIFICATION),
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TAG_PNP_NOTIFY);
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if (!NotificationInfos)
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{
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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return;
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}
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NotificationInfos->Version = 1;
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NotificationInfos->Size = sizeof(DEVICE_INTERFACE_CHANGE_NOTIFICATION);
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RtlCopyMemory(&NotificationInfos->Event, Event, sizeof(GUID));
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RtlCopyMemory(&NotificationInfos->InterfaceClassGuid, EventCategoryData1, sizeof(GUID));
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NotificationInfos->SymbolicLinkName = (PUNICODE_STRING)EventCategoryData2;
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Status = RtlStringFromGUID(&NotificationInfos->InterfaceClassGuid, &GuidString);
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if (!NT_SUCCESS(Status))
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{
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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ExFreePoolWithTag(NotificationStructure, TAG_PNP_NOTIFY);
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return;
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}
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break;
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}
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case EventCategoryHardwareProfileChange:
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{
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PHWPROFILE_CHANGE_NOTIFICATION NotificationInfos;
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NotificationStructure = NotificationInfos = ExAllocatePoolWithTag(
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PagedPool,
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sizeof(HWPROFILE_CHANGE_NOTIFICATION),
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TAG_PNP_NOTIFY);
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if (!NotificationInfos)
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{
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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return;
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}
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NotificationInfos->Version = 1;
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NotificationInfos->Size = sizeof(HWPROFILE_CHANGE_NOTIFICATION);
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RtlCopyMemory(&NotificationInfos->Event, Event, sizeof(GUID));
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break;
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}
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case EventCategoryTargetDeviceChange:
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{
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if (Event != &GUID_PNP_CUSTOM_NOTIFICATION)
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{
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PTARGET_DEVICE_REMOVAL_NOTIFICATION NotificationInfos;
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NotificationStructure = NotificationInfos = ExAllocatePoolWithTag(
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PagedPool,
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sizeof(TARGET_DEVICE_REMOVAL_NOTIFICATION),
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TAG_PNP_NOTIFY);
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if (!NotificationInfos)
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{
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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return;
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}
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NotificationInfos->Version = 1;
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NotificationInfos->Size = sizeof(TARGET_DEVICE_REMOVAL_NOTIFICATION);
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RtlCopyMemory(&NotificationInfos->Event, Event, sizeof(GUID));
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}
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else
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{
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PTARGET_DEVICE_CUSTOM_NOTIFICATION NotificationInfos;
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NotificationStructure = NotificationInfos = ExAllocatePoolWithTag(
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PagedPool,
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sizeof(TARGET_DEVICE_CUSTOM_NOTIFICATION),
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TAG_PNP_NOTIFY);
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if (!NotificationInfos)
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{
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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return;
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}
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RtlCopyMemory(NotificationInfos, EventCategoryData1, sizeof(TARGET_DEVICE_CUSTOM_NOTIFICATION));
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}
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break;
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}
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default:
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{
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DPRINT1("IopNotifyPlugPlayNotification(): unknown EventCategory 0x%x UNIMPLEMENTED\n", EventCategory);
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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return;
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}
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}
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/* Loop through procedures registred in PnpNotifyListHead
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* list to find those that meet some criteria.
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*/
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ListEntry = PnpNotifyListHead.Flink;
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while (ListEntry != &PnpNotifyListHead)
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{
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ChangeEntry = CONTAINING_RECORD(ListEntry, PNP_NOTIFY_ENTRY, PnpNotifyList);
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CallCurrentEntry = FALSE;
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if (ChangeEntry->EventCategory != EventCategory)
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{
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ListEntry = ListEntry->Flink;
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continue;
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}
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switch (EventCategory)
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{
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case EventCategoryDeviceInterfaceChange:
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{
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if (RtlCompareUnicodeString(&ChangeEntry->Guid, &GuidString, FALSE) == 0)
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{
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CallCurrentEntry = TRUE;
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}
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break;
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}
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case EventCategoryHardwareProfileChange:
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{
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CallCurrentEntry = TRUE;
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break;
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}
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case EventCategoryTargetDeviceChange:
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{
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Status = IoGetRelatedTargetDevice(ChangeEntry->FileObject, &EntryDeviceObject);
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if (NT_SUCCESS(Status))
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{
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if (DeviceObject == EntryDeviceObject)
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{
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if (Event == &GUID_PNP_CUSTOM_NOTIFICATION)
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{
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((PTARGET_DEVICE_CUSTOM_NOTIFICATION)NotificationStructure)->FileObject = ChangeEntry->FileObject;
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}
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else
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{
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((PTARGET_DEVICE_REMOVAL_NOTIFICATION)NotificationStructure)->FileObject = ChangeEntry->FileObject;
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}
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CallCurrentEntry = TRUE;
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}
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}
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break;
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}
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default:
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{
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DPRINT1("IopNotifyPlugPlayNotification(): unknown EventCategory 0x%x UNIMPLEMENTED\n", EventCategory);
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break;
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}
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}
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/* Move to the next element now, as callback may unregister itself */
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ListEntry = ListEntry->Flink;
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/* FIXME: If ListEntry was the last element and that callback registers
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* new notifications, those won't be checked... */
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if (CallCurrentEntry)
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{
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/* Call entry into new allocated memory */
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DPRINT("IopNotifyPlugPlayNotification(): found suitable callback %p\n",
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ChangeEntry);
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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(ChangeEntry->PnpNotificationProc)(
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NotificationStructure,
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ChangeEntry->Context);
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KeAcquireGuardedMutex(&PnpNotifyListLock);
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}
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}
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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ExFreePoolWithTag(NotificationStructure, TAG_PNP_NOTIFY);
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if (EventCategory == EventCategoryDeviceInterfaceChange)
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RtlFreeUnicodeString(&GuidString);
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}
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/* PUBLIC FUNCTIONS **********************************************************/
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/*
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* @unimplemented
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*/
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ULONG
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NTAPI
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IoPnPDeliverServicePowerNotification(ULONG VetoedPowerOperation OPTIONAL,
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ULONG PowerNotification,
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ULONG Unknown OPTIONAL,
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BOOLEAN Synchronous)
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{
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UNIMPLEMENTED;
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return 0;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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IoRegisterPlugPlayNotification(IN IO_NOTIFICATION_EVENT_CATEGORY EventCategory,
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IN ULONG EventCategoryFlags,
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IN PVOID EventCategoryData OPTIONAL,
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IN PDRIVER_OBJECT DriverObject,
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IN PDRIVER_NOTIFICATION_CALLBACK_ROUTINE CallbackRoutine,
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IN PVOID Context,
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OUT PVOID *NotificationEntry)
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{
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PPNP_NOTIFY_ENTRY Entry;
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PWSTR SymbolicLinkList;
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NTSTATUS Status;
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PAGED_CODE();
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DPRINT("%s(EventCategory 0x%x, EventCategoryFlags 0x%lx, DriverObject %p) called.\n",
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__FUNCTION__,
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EventCategory,
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EventCategoryFlags,
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DriverObject);
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ObReferenceObject(DriverObject);
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/* Try to allocate entry for notification before sending any notification */
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Entry = ExAllocatePoolWithTag(NonPagedPool,
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sizeof(PNP_NOTIFY_ENTRY),
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TAG_PNP_NOTIFY);
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if (!Entry)
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{
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DPRINT("ExAllocatePool() failed\n");
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ObDereferenceObject(DriverObject);
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return STATUS_INSUFFICIENT_RESOURCES;
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}
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if (EventCategory == EventCategoryDeviceInterfaceChange &&
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EventCategoryFlags & PNPNOTIFY_DEVICE_INTERFACE_INCLUDE_EXISTING_INTERFACES)
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{
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DEVICE_INTERFACE_CHANGE_NOTIFICATION NotificationInfos;
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UNICODE_STRING SymbolicLinkU;
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PWSTR SymbolicLink;
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Status = IoGetDeviceInterfaces((LPGUID)EventCategoryData,
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NULL, /* PhysicalDeviceObject OPTIONAL */
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0, /* Flags */
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&SymbolicLinkList);
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if (NT_SUCCESS(Status))
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{
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/* Enumerate SymbolicLinkList */
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NotificationInfos.Version = 1;
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NotificationInfos.Size = sizeof(DEVICE_INTERFACE_CHANGE_NOTIFICATION);
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RtlCopyMemory(&NotificationInfos.Event,
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&GUID_DEVICE_INTERFACE_ARRIVAL,
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sizeof(GUID));
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RtlCopyMemory(&NotificationInfos.InterfaceClassGuid,
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EventCategoryData,
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sizeof(GUID));
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NotificationInfos.SymbolicLinkName = &SymbolicLinkU;
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for (SymbolicLink = SymbolicLinkList;
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*SymbolicLink;
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SymbolicLink += wcslen(SymbolicLink) + 1)
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{
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RtlInitUnicodeString(&SymbolicLinkU, SymbolicLink);
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DPRINT("Calling callback routine for %S\n", SymbolicLink);
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(*CallbackRoutine)(&NotificationInfos, Context);
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}
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ExFreePool(SymbolicLinkList);
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}
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}
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Entry->PnpNotificationProc = CallbackRoutine;
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Entry->EventCategory = EventCategory;
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Entry->Context = Context;
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Entry->DriverObject = DriverObject;
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switch (EventCategory)
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{
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case EventCategoryDeviceInterfaceChange:
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{
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Status = RtlStringFromGUID(EventCategoryData, &Entry->Guid);
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if (!NT_SUCCESS(Status))
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{
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ExFreePoolWithTag(Entry, TAG_PNP_NOTIFY);
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ObDereferenceObject(DriverObject);
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return Status;
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}
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break;
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}
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case EventCategoryHardwareProfileChange:
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{
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/* nothing to do */
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break;
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}
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case EventCategoryTargetDeviceChange:
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{
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Entry->FileObject = (PFILE_OBJECT)EventCategoryData;
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break;
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}
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default:
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{
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DPRINT1("%s: unknown EventCategory 0x%x UNIMPLEMENTED\n",
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__FUNCTION__, EventCategory);
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break;
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}
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}
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KeAcquireGuardedMutex(&PnpNotifyListLock);
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InsertHeadList(&PnpNotifyListHead,
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&Entry->PnpNotifyList);
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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DPRINT("%s returns NotificationEntry %p\n", __FUNCTION__, Entry);
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*NotificationEntry = Entry;
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return STATUS_SUCCESS;
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}
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/*
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* @implemented
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*/
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NTSTATUS
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NTAPI
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IoUnregisterPlugPlayNotification(IN PVOID NotificationEntry)
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{
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PPNP_NOTIFY_ENTRY Entry;
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PAGED_CODE();
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Entry = (PPNP_NOTIFY_ENTRY)NotificationEntry;
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DPRINT("%s(NotificationEntry %p) called\n", __FUNCTION__, Entry);
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KeAcquireGuardedMutex(&PnpNotifyListLock);
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RemoveEntryList(&Entry->PnpNotifyList);
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KeReleaseGuardedMutex(&PnpNotifyListLock);
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RtlFreeUnicodeString(&Entry->Guid);
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ObDereferenceObject(Entry->DriverObject);
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ExFreePoolWithTag(Entry, TAG_PNP_NOTIFY);
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return STATUS_SUCCESS;
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}
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