/*
* --------------------------------------------------------------------------
* This function allocated the switch context, and initializes its necessary
* members.
* --------------------------------------------------------------------------
*/
NDIS_STATUS
OvsCreateSwitch(NDIS_HANDLE ndisFilterHandle,
POVS_SWITCH_CONTEXT *switchContextOut)
{
NDIS_STATUS status;
POVS_SWITCH_CONTEXT switchContext;
NDIS_SWITCH_CONTEXT hostSwitchContext;
NDIS_SWITCH_OPTIONAL_HANDLERS hostSwitchHandler;
OVS_LOG_TRACE("Enter: Create switch object");
switchContext = (POVS_SWITCH_CONTEXT) OvsAllocateMemoryWithTag(
sizeof(OVS_SWITCH_CONTEXT), OVS_SWITCH_POOL_TAG);
if (switchContext == NULL) {
status = NDIS_STATUS_RESOURCES;
goto create_switch_done;
}
RtlZeroMemory(switchContext, sizeof(OVS_SWITCH_CONTEXT));
/* Initialize the switch. */
hostSwitchHandler.Header.Type = NDIS_OBJECT_TYPE_SWITCH_OPTIONAL_HANDLERS;
hostSwitchHandler.Header.Size = NDIS_SIZEOF_SWITCH_OPTIONAL_HANDLERS_REVISION_1;
hostSwitchHandler.Header.Revision = NDIS_SWITCH_OPTIONAL_HANDLERS_REVISION_1;
status = NdisFGetOptionalSwitchHandlers(ndisFilterHandle,
&hostSwitchContext,
&hostSwitchHandler);
if (status != NDIS_STATUS_SUCCESS) {
OVS_LOG_ERROR("OvsExtAttach: Extension is running in "
"non-switch environment.");
OvsFreeMemoryWithTag(switchContext, OVS_SWITCH_POOL_TAG);
goto create_switch_done;
}
switchContext->NdisFilterHandle = ndisFilterHandle;
switchContext->NdisSwitchContext = hostSwitchContext;
RtlCopyMemory(&switchContext->NdisSwitchHandlers, &hostSwitchHandler,
sizeof(NDIS_SWITCH_OPTIONAL_HANDLERS));
status = OvsInitSwitchContext(switchContext);
if (status != NDIS_STATUS_SUCCESS) {
OvsFreeMemoryWithTag(switchContext, OVS_SWITCH_POOL_TAG);
switchContext = NULL;
goto create_switch_done;
}
status = OvsInitTunnelFilter(gOvsExtDriverObject, gOvsDeviceObject);
if (status != NDIS_STATUS_SUCCESS) {
OvsUninitSwitchContext(switchContext);
goto create_switch_done;
}
*switchContextOut = switchContext;
create_switch_done:
OVS_LOG_TRACE("Exit: switchContext: %p status: %#lx",
switchContext, status);
return status;
}
/*
* --------------------------------------------------------------------------
* Utility function to get the array of nics on the extensible switch. Upon
* success, the caller needs to free the returned array.
* --------------------------------------------------------------------------
*/
NDIS_STATUS
OvsGetNicsOnSwitch(POVS_SWITCH_CONTEXT switchContext,
PNDIS_SWITCH_NIC_ARRAY *nicArrayOut)
{
PNDIS_SWITCH_NIC_ARRAY nicArray;
UINT32 arraySize = sizeof *nicArray;
NDIS_STATUS status = NDIS_STATUS_FAILURE;
OVS_LOG_TRACE("Enter: switchContext: %p, nicArray: %p",
switchContext, nicArrayOut);
do {
UINT32 reqdArraySize;
nicArray = OvsAllocateMemoryWithTag(arraySize, OVS_OID_POOL_TAG);
if (!nicArray) {
status = NDIS_STATUS_RESOURCES;
goto done;
}
/*
* Even though 'nicArray' is supposed to be populated by the OID, it
* needs to be initialized nevertheless. Otherwise, OID returns
* NDIS_STATUS_INVALID_PARAMETER. This is not clear in the documentation.
*/
RtlZeroMemory(nicArray, sizeof *nicArray);
nicArray->Header.Revision = NDIS_SWITCH_NIC_ARRAY_REVISION_1;
nicArray->Header.Type = NDIS_OBJECT_TYPE_DEFAULT;
nicArray->Header.Size = NDIS_SIZEOF_NDIS_SWITCH_NIC_ARRAY_REVISION_1;
status = OvsIssueOidRequest(switchContext, NdisRequestQueryInformation,
OID_SWITCH_NIC_ARRAY, NULL, 0,
(PVOID)nicArray, arraySize,
&reqdArraySize);
if (status == NDIS_STATUS_SUCCESS) {
*nicArrayOut = nicArray;
break;
}
OvsFreeMemoryWithTag(nicArray, OVS_OID_POOL_TAG);
arraySize = reqdArraySize;
if (status != NDIS_STATUS_INVALID_LENGTH) {
break;
}
} while(status == NDIS_STATUS_INVALID_LENGTH);
done:
OVS_LOG_TRACE("Exit: status %8x.", status);
return status;
}
/*
* --------------------------------------------------------------------------
* Utility function to query if the extensible switch has completed activation
* successfully.
* --------------------------------------------------------------------------
*/
NDIS_STATUS
OvsQuerySwitchActivationComplete(POVS_SWITCH_CONTEXT switchContext,
BOOLEAN *switchActive)
{
NDIS_STATUS status;
PNDIS_SWITCH_PARAMETERS switchParams;
UINT32 outputSizeNeeded;
OVS_LOG_TRACE("Enter: switchContext: %p, switchActive: %p",
switchContext, switchActive);
switchParams = OvsAllocateMemoryWithTag(sizeof *switchParams,
OVS_OID_POOL_TAG);
if (!switchParams) {
status = NDIS_STATUS_RESOURCES;
goto done;
}
/*
* Even though 'switchParms' is supposed to be populated by the OID, it
* needs to be initialized nevertheless. Otherwise, OID returns
* NDIS_STATUS_INVALID_PARAMETER. This is not clear in the documentation.
*/
RtlZeroMemory(switchParams, sizeof *switchParams);
switchParams->Header.Revision = NDIS_SWITCH_PARAMETERS_REVISION_1;
switchParams->Header.Type = NDIS_OBJECT_TYPE_DEFAULT;
switchParams->Header.Size = NDIS_SIZEOF_NDIS_SWITCH_PARAMETERS_REVISION_1;
status = OvsIssueOidRequest(switchContext, NdisRequestQueryInformation,
OID_SWITCH_PARAMETERS, NULL, 0,
(PVOID)switchParams, sizeof *switchParams,
&outputSizeNeeded);
ASSERT(status != NDIS_STATUS_INVALID_LENGTH);
ASSERT(status != NDIS_STATUS_PENDING);
if (status == NDIS_STATUS_SUCCESS) {
ASSERT(switchParams->Header.Type == NDIS_OBJECT_TYPE_DEFAULT);
ASSERT(switchParams->Header.Revision == NDIS_SWITCH_PARAMETERS_REVISION_1);
ASSERT(switchParams->Header.Size ==
NDIS_SIZEOF_NDIS_SWITCH_PARAMETERS_REVISION_1);
*switchActive = switchParams->IsActive;
}
OvsFreeMemoryWithTag(switchParams, OVS_OID_POOL_TAG);
done:
OVS_LOG_TRACE("Exit: status %8x, switchActive: %d.",
status, *switchActive);
return status;
}
VOID *
OvsAllocateMemoryPerCpu(size_t size, ULONG tag)
{
VOID *ptr = NULL;
ULONG count = KeQueryActiveProcessorCountEx(ALL_PROCESSOR_GROUPS);
ASSERT(KeQueryActiveGroupCount() == 1);
ptr = OvsAllocateMemoryWithTag(count * size, tag);
if (ptr) {
RtlZeroMemory(ptr, count * size);
}
return ptr;
}
OVS_CT_ENTRY *
OvsConntrackCreateTcpEntry(const TCPHdr *tcp,
PNET_BUFFER_LIST nbl,
UINT64 now)
{
struct conn_tcp* newconn;
struct tcp_peer *src, *dst;
newconn = OvsAllocateMemoryWithTag(sizeof(struct conn_tcp),
OVS_CT_POOL_TAG);
if (!newconn) {
return NULL;
}
newconn->up = (OVS_CT_ENTRY) {0};
src = &newconn->peer[0];
dst = &newconn->peer[1];
src->seqlo = ntohl(tcp->seq);
src->seqhi = src->seqlo + OvsGetTcpPayloadLength(nbl) + 1;
if (tcp->flags & TCP_SYN) {
src->seqhi++;
src->wscale = OvsTcpGetWscale(tcp);
} else {
src->wscale = CT_WSCALE_UNKNOWN;
dst->wscale = CT_WSCALE_UNKNOWN;
}
src->max_win = MAX(ntohs(tcp->window), 1);
if (src->wscale & CT_WSCALE_MASK) {
/* Remove scale factor from initial window */
uint8_t sws = src->wscale & CT_WSCALE_MASK;
src->max_win = DIV_ROUND_UP((uint32_t) src->max_win, 1 << sws);
}
if (tcp->flags & TCP_FIN) {
src->seqhi++;
}
dst->seqhi = 1;
dst->max_win = 1;
src->state = CT_DPIF_TCPS_SYN_SENT;
dst->state = CT_DPIF_TCPS_CLOSED;
OvsConntrackUpdateExpiration(newconn, now, CT_ENTRY_TIMEOUT);
return &newconn->up;
}
static PMDL
OvsAllocateMDLAndData(NDIS_HANDLE ndisHandle,
UINT32 dataSize)
{
PMDL mdl;
PVOID data;
data = OvsAllocateMemoryWithTag(dataSize, OVS_MDL_POOL_TAG);
if (data == NULL) {
return NULL;
}
mdl = NdisAllocateMdl(ndisHandle, data, dataSize);
if (mdl == NULL) {
OvsFreeMemoryWithTag(data, OVS_MDL_POOL_TAG);
}
return mdl;
}
static NDIS_STATUS
OvsInitSwitchContext(POVS_SWITCH_CONTEXT switchContext)
{
int i;
NTSTATUS status;
OVS_LOG_TRACE("Enter: switchContext: %p", switchContext);
switchContext->dispatchLock =
NdisAllocateRWLock(switchContext->NdisFilterHandle);
switchContext->portNoHashArray = (PLIST_ENTRY)OvsAllocateMemoryWithTag(
sizeof(LIST_ENTRY) * OVS_MAX_VPORT_ARRAY_SIZE, OVS_SWITCH_POOL_TAG);
switchContext->ovsPortNameHashArray = (PLIST_ENTRY)OvsAllocateMemoryWithTag(
sizeof(LIST_ENTRY) * OVS_MAX_VPORT_ARRAY_SIZE, OVS_SWITCH_POOL_TAG);
switchContext->portIdHashArray= (PLIST_ENTRY)OvsAllocateMemoryWithTag(
sizeof(LIST_ENTRY) * OVS_MAX_VPORT_ARRAY_SIZE, OVS_SWITCH_POOL_TAG);
switchContext->pidHashArray = (PLIST_ENTRY)OvsAllocateMemoryWithTag(
sizeof(LIST_ENTRY) * OVS_MAX_PID_ARRAY_SIZE, OVS_SWITCH_POOL_TAG);
status = OvsAllocateFlowTable(&switchContext->datapath, switchContext);
if (status == NDIS_STATUS_SUCCESS) {
status = OvsInitBufferPool(switchContext);
}
if (status != NDIS_STATUS_SUCCESS ||
switchContext->dispatchLock == NULL ||
switchContext->portNoHashArray == NULL ||
switchContext->ovsPortNameHashArray == NULL ||
switchContext->portIdHashArray== NULL ||
switchContext->pidHashArray == NULL) {
if (switchContext->dispatchLock) {
NdisFreeRWLock(switchContext->dispatchLock);
}
if (switchContext->portNoHashArray) {
OvsFreeMemoryWithTag(switchContext->portNoHashArray,
OVS_SWITCH_POOL_TAG);
}
if (switchContext->ovsPortNameHashArray) {
OvsFreeMemoryWithTag(switchContext->ovsPortNameHashArray,
OVS_SWITCH_POOL_TAG);
}
if (switchContext->portIdHashArray) {
OvsFreeMemoryWithTag(switchContext->portIdHashArray,
OVS_SWITCH_POOL_TAG);
}
if (switchContext->pidHashArray) {
OvsFreeMemoryWithTag(switchContext->pidHashArray,
OVS_SWITCH_POOL_TAG);
}
OvsDeleteFlowTable(&switchContext->datapath);
OvsCleanupBufferPool(switchContext);
OVS_LOG_TRACE("Exit: Failed to init switchContext");
return NDIS_STATUS_RESOURCES;
}
for (i = 0; i < OVS_MAX_VPORT_ARRAY_SIZE; i++) {
InitializeListHead(&switchContext->ovsPortNameHashArray[i]);
}
for (i = 0; i < OVS_MAX_VPORT_ARRAY_SIZE; i++) {
InitializeListHead(&switchContext->portIdHashArray[i]);
}
for (i = 0; i < OVS_MAX_VPORT_ARRAY_SIZE; i++) {
InitializeListHead(&switchContext->portNoHashArray[i]);
}
for (i = 0; i < OVS_MAX_PID_ARRAY_SIZE; i++) {
InitializeListHead(&switchContext->pidHashArray[i]);
}
NdisAllocateSpinLock(&(switchContext->pidHashLock));
switchContext->isActivated = FALSE;
switchContext->isActivateFailed = FALSE;
switchContext->dpNo = OVS_DP_NUMBER;
ovsTimeIncrementPerTick = KeQueryTimeIncrement() / 10000;
OVS_LOG_TRACE("Exit: Succesfully initialized switchContext: %p",
switchContext);
return NDIS_STATUS_SUCCESS;
}
/*
* --------------------------------------------------------------------------
* Utility function to issue the specified OID to the NDIS stack. The OID is
* directed towards the miniport edge of the extensible switch.
* An OID that gets issued may not complete immediately, and in such cases, the
* function waits for the OID to complete. Thus, this function must not be
* called at the PASSIVE_LEVEL.
* --------------------------------------------------------------------------
*/
static NDIS_STATUS
OvsIssueOidRequest(POVS_SWITCH_CONTEXT switchContext,
NDIS_REQUEST_TYPE oidType,
UINT32 oidRequestEnum,
PVOID oidInputBuffer,
UINT32 inputSize,
PVOID oidOutputBuffer,
UINT32 outputSize,
UINT32 *outputSizeNeeded)
{
NDIS_STATUS status;
PNDIS_OID_REQUEST oidRequest;
POVS_OID_CONTEXT oidContext;
ULONG OvsExtOidRequestId = 'ISVO';
DBG_UNREFERENCED_PARAMETER(inputSize);
DBG_UNREFERENCED_PARAMETER(oidInputBuffer);
OVS_LOG_TRACE("Enter: switchContext: %p, oidType: %d",
switchContext, oidType);
ASSERT(oidInputBuffer == NULL || inputSize != 0);
ASSERT(oidOutputBuffer == NULL || outputSize != 0);
ASSERT(KeGetCurrentIrql() == PASSIVE_LEVEL);
oidRequest = OvsAllocateMemoryWithTag(sizeof *oidRequest,
OVS_OID_POOL_TAG);
if (!oidRequest) {
status = NDIS_STATUS_RESOURCES;
goto done;
}
oidContext = OvsAllocateMemoryWithTag(sizeof *oidContext,
OVS_OID_POOL_TAG);
if (!oidContext) {
OvsFreeMemoryWithTag(oidRequest, OVS_OID_POOL_TAG);
status = NDIS_STATUS_RESOURCES;
goto done;
}
RtlZeroMemory(oidRequest, sizeof *oidRequest);
RtlZeroMemory(oidContext, sizeof *oidContext);
oidRequest->Header.Type = NDIS_OBJECT_TYPE_OID_REQUEST;
oidRequest->Header.Revision = NDIS_OID_REQUEST_REVISION_1;
oidRequest->Header.Size = NDIS_SIZEOF_OID_REQUEST_REVISION_1;
oidRequest->RequestType = oidType;
oidRequest->PortNumber = 0;
oidRequest->Timeout = 0;
oidRequest->RequestId = (PVOID)OvsExtOidRequestId;
switch(oidType) {
case NdisRequestQueryInformation:
oidRequest->DATA.QUERY_INFORMATION.Oid = oidRequestEnum;
oidRequest->DATA.QUERY_INFORMATION.InformationBuffer = oidOutputBuffer;
oidRequest->DATA.QUERY_INFORMATION.InformationBufferLength = outputSize;
break;
default:
ASSERT(FALSE);
status = NDIS_STATUS_INVALID_PARAMETER;
break;
}
/*
* We make use of the SourceReserved field in the OID request to store
* pointers to the original OID (if any), and also context for completion
* (if any).
*/
oidContext->status = NDIS_STATUS_SUCCESS;
NdisInitializeEvent(&oidContext->oidComplete);
OvsOidSetOrigRequest(oidRequest, NULL);
OvsOidSetContext(oidRequest, oidContext);
NdisInterlockedIncrement(&(switchContext->pendingOidCount));
status = NdisFOidRequest(switchContext->NdisFilterHandle, oidRequest);
if (status == NDIS_STATUS_PENDING) {
NdisWaitEvent(&oidContext->oidComplete, 0);
} else {
NdisInterlockedDecrement(&(switchContext->pendingOidCount));
}
if (status == NDIS_STATUS_INVALID_LENGTH ||
oidContext->status == NDIS_STATUS_INVALID_LENGTH) {
switch(oidType) {
case NdisRequestQueryInformation:
*outputSizeNeeded = oidRequest->DATA.QUERY_INFORMATION.BytesNeeded;
}
}
status = oidContext->status;
ASSERT(status != NDIS_STATUS_PENDING);
OvsFreeMemoryWithTag(oidRequest, OVS_OID_POOL_TAG);
OvsFreeMemoryWithTag(oidContext, OVS_OID_POOL_TAG);
done:
OVS_LOG_TRACE("Exit: status %8x.", status);
return status;
}
