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/*
* Copyright (c) 2014 VMware, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "precomp.h"
#include "Switch.h"
#include "User.h"
#include "Datapath.h"
#ifdef OVS_DBG_MOD
#undef OVS_DBG_MOD
#endif
#define OVS_DBG_MOD OVS_DBG_DRIVER
#include "Debug.h"
/* Global handles. XXX: Some of them need not be global. */
/*
* Maps to DriverObject and FilterDriverContext parameters in the NDIS filter
* driver functions.
* DriverObject is specified by NDIS.
* FilterDriverContext is specified by the filter driver.
*/
NDIS_HANDLE gOvsExtDriverObject;
/*
* Maps to NdisFilterHandle parameter in the NDIS filter driver functions.
* NdisFilterHandle is returned by NDISFRegisterFilterDriver.
*/
NDIS_HANDLE gOvsExtDriverHandle;
/*
* Maps to FilterModuleContext parameter in the NDIS filter driver functions.
* FilterModuleContext is a allocated by the driver in the FilterAttach
* function.
*/
extern POVS_SWITCH_CONTEXT gOvsSwitchContext;
static PWCHAR ovsExtFriendlyName = L"Open vSwitch Extension";
static PWCHAR ovsExtServiceName = L"OVSExt";
NDIS_STRING ovsExtGuidUC;
NDIS_STRING ovsExtFriendlyNameUC;
static PWCHAR ovsExtGuidStr = L"{583CC151-73EC-4A6A-8B47-578297AD7623}";
static const GUID ovsExtGuid = {
0x583cc151,
0x73ec,
0x4a6a,
{0x8b, 0x47, 0x57, 0x82, 0x97, 0xad, 0x76, 0x23}
};
DRIVER_INITIALIZE DriverEntry;
/* Declarations of callback functions for the filter driver. */
DRIVER_UNLOAD OvsExtUnload;
FILTER_NET_PNP_EVENT OvsExtNetPnPEvent;
FILTER_STATUS OvsExtStatus;
FILTER_ATTACH OvsExtAttach;
FILTER_DETACH OvsExtDetach;
FILTER_RESTART OvsExtRestart;
FILTER_PAUSE OvsExtPause;
FILTER_SEND_NET_BUFFER_LISTS OvsExtSendNBL;
FILTER_SEND_NET_BUFFER_LISTS_COMPLETE OvsExtSendNBLComplete;
FILTER_CANCEL_SEND_NET_BUFFER_LISTS OvsExtCancelSendNBL;
FILTER_RECEIVE_NET_BUFFER_LISTS OvsExtReceiveNBL;
FILTER_RETURN_NET_BUFFER_LISTS OvsExtReturnNBL;
FILTER_OID_REQUEST OvsExtOidRequest;
FILTER_OID_REQUEST_COMPLETE OvsExtOidRequestComplete;
FILTER_CANCEL_OID_REQUEST OvsExtCancelOidRequest;
/*
* --------------------------------------------------------------------------
* Init/Load function for the OVSEXT filter Driver.
* --------------------------------------------------------------------------
*/
NTSTATUS
DriverEntry(PDRIVER_OBJECT driverObject,
PUNICODE_STRING registryPath)
{
NDIS_STATUS status;
NDIS_FILTER_DRIVER_CHARACTERISTICS driverChars;
UNREFERENCED_PARAMETER(registryPath);
/* Initialize driver associated data structures. */
status = OvsInit();
if (status != NDIS_STATUS_SUCCESS) {
goto cleanup;
}
gOvsExtDriverObject = driverObject;
RtlZeroMemory(&driverChars, sizeof driverChars);
driverChars.Header.Type = NDIS_OBJECT_TYPE_FILTER_DRIVER_CHARACTERISTICS;
driverChars.Header.Size = sizeof driverChars;
driverChars.Header.Revision = NDIS_FILTER_CHARACTERISTICS_REVISION_2;
driverChars.MajorNdisVersion = NDIS_FILTER_MAJOR_VERSION;
driverChars.MinorNdisVersion = NDIS_FILTER_MINOR_VERSION;
driverChars.MajorDriverVersion = 1;
driverChars.MinorDriverVersion = 0;
driverChars.Flags = 0;
RtlInitUnicodeString(&driverChars.ServiceName, ovsExtServiceName);
RtlInitUnicodeString(&ovsExtFriendlyNameUC, ovsExtFriendlyName);
RtlInitUnicodeString(&ovsExtGuidUC, ovsExtGuidStr);
driverChars.FriendlyName = ovsExtFriendlyNameUC;
driverChars.UniqueName = ovsExtGuidUC;
driverChars.AttachHandler = OvsExtAttach;
driverChars.DetachHandler = OvsExtDetach;
driverChars.RestartHandler = OvsExtRestart;
driverChars.PauseHandler = OvsExtPause;
driverChars.SendNetBufferListsHandler = OvsExtSendNBL;
driverChars.SendNetBufferListsCompleteHandler = OvsExtSendNBLComplete;
driverChars.CancelSendNetBufferListsHandler = OvsExtCancelSendNBL;
driverChars.ReceiveNetBufferListsHandler = NULL;
driverChars.ReturnNetBufferListsHandler = NULL;
driverChars.OidRequestHandler = OvsExtOidRequest;
driverChars.OidRequestCompleteHandler = OvsExtOidRequestComplete;
driverChars.CancelOidRequestHandler = OvsExtCancelOidRequest;
driverChars.DevicePnPEventNotifyHandler = NULL;
driverChars.NetPnPEventHandler = OvsExtNetPnPEvent;
driverChars.StatusHandler = NULL;
driverObject->DriverUnload = OvsExtUnload;
gOvsExtDriverHandle = NULL;
status = NdisFRegisterFilterDriver(driverObject,
(NDIS_HANDLE)gOvsExtDriverObject,
&driverChars,
&gOvsExtDriverHandle);
if (status != NDIS_STATUS_SUCCESS) {
goto cleanup;
}
/* Create the communication channel for userspace. */
status = OvsCreateDeviceObject(gOvsExtDriverHandle);
if (status != NDIS_STATUS_SUCCESS) {
NdisFDeregisterFilterDriver(gOvsExtDriverHandle);
gOvsExtDriverHandle = NULL;
goto cleanup;
}
cleanup:
if (status != NDIS_STATUS_SUCCESS){
OvsCleanup();
}
return status;
}
/*
* --------------------------------------------------------------------------
* Un-init/Unload function for the OVS intermediate Driver.
* --------------------------------------------------------------------------
*/
VOID
OvsExtUnload(struct _DRIVER_OBJECT *driverObject)
{
UNREFERENCED_PARAMETER(driverObject);
OvsDeleteDeviceObject();
NdisFDeregisterFilterDriver(gOvsExtDriverHandle);
/* Release driver associated data structures. */
OvsCleanup();
}
/*
* --------------------------------------------------------------------------
* Implements filter driver's FilterStatus function.
* --------------------------------------------------------------------------
*/
VOID
OvsExtStatus(NDIS_HANDLE filterModuleContext,
PNDIS_STATUS_INDICATION statusIndication)
{
UNREFERENCED_PARAMETER(statusIndication);
POVS_SWITCH_CONTEXT switchObject = (POVS_SWITCH_CONTEXT)filterModuleContext;
NdisFIndicateStatus(switchObject->NdisFilterHandle, statusIndication);
}
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