datapath-windows: Add GRE TEB support for windows datapath
[cascardo/ovs.git] / datapath-windows / ovsext / Vport.c
index 4ade842..7b0103d 100644 (file)
  */
 
 #include "precomp.h"
+
+#include "Datapath.h"
+#include "Event.h"
+#include "Gre.h"
+#include "IpHelper.h"
 #include "Jhash.h"
+#include "Oid.h"
+#include "Stt.h"
 #include "Switch.h"
-#include "Vport.h"
-#include "Event.h"
 #include "User.h"
+#include "Vport.h"
 #include "Vxlan.h"
-#include "Stt.h"
-#include "IpHelper.h"
-#include "Oid.h"
-#include "Datapath.h"
 
 #ifdef OVS_DBG_MOD
 #undef OVS_DBG_MOD
@@ -68,8 +70,8 @@ static VOID OvsInitVportWithPortParam(POVS_VPORT_ENTRY vport,
                 PNDIS_SWITCH_PORT_PARAMETERS portParam);
 static VOID OvsInitVportWithNicParam(POVS_SWITCH_CONTEXT switchContext,
                 POVS_VPORT_ENTRY vport, PNDIS_SWITCH_NIC_PARAMETERS nicParam);
-static VOID OvsInitPhysNicVport(POVS_VPORT_ENTRY physExtVPort,
-                POVS_VPORT_ENTRY virtExtVport, UINT32 nicIndex);
+static VOID OvsCopyPortParamsFromVport(POVS_VPORT_ENTRY vport,
+                                       PNDIS_SWITCH_PORT_PARAMETERS portParam);
 static __inline VOID OvsWaitActivate(POVS_SWITCH_CONTEXT switchContext,
                                      ULONG sleepMicroSec);
 static NTSTATUS OvsGetExtInfoIoctl(POVS_VPORT_GET vportGet,
@@ -81,9 +83,8 @@ static NTSTATUS CreateNetlinkMesgForNetdev(POVS_VPORT_EXT_INFO info,
                                            int dpIfIndex);
 static POVS_VPORT_ENTRY OvsFindVportByHvNameW(POVS_SWITCH_CONTEXT switchContext,
                                               PWSTR wsName, SIZE_T wstrSize);
-static NDIS_STATUS InitHvVportCommon(POVS_SWITCH_CONTEXT switchContext,
-                                     POVS_VPORT_ENTRY vport,
-                                     BOOLEAN newPort);
+static VOID UpdateSwitchCtxWithVport(POVS_SWITCH_CONTEXT switchContext,
+                                     POVS_VPORT_ENTRY vport, BOOLEAN newPort);
 static NTSTATUS OvsRemoveTunnelVport(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
                                      POVS_SWITCH_CONTEXT switchContext,
                                      POVS_VPORT_ENTRY vport,
@@ -95,14 +96,20 @@ static VOID OvsTunnelVportPendingInit(PVOID context,
 static VOID OvsTunnelVportPendingRemove(PVOID context,
                                         NTSTATUS status,
                                         UINT32 *replyLen);
-static VOID AssignNicNameSpecial(POVS_VPORT_ENTRY vport);
+static NTSTATUS GetNICAlias(GUID *netCfgInstanceId,
+                            IF_COUNTED_STRING *portFriendlyName);
 
 /*
- * Functions implemented in relaton to NDIS port manipulation.
+ * --------------------------------------------------------------------------
+ *  Creates a Vport entry for a Hyper-V switch port. 'nicIndex' is typically
+ *  associated with a NIC than a port. We use it here for the special case
+ *  where we need to create a Vport for an external NIC with NicIndex > 0.
+ * --------------------------------------------------------------------------
  */
 NDIS_STATUS
 HvCreatePort(POVS_SWITCH_CONTEXT switchContext,
-             PNDIS_SWITCH_PORT_PARAMETERS portParam)
+             PNDIS_SWITCH_PORT_PARAMETERS portParam,
+             NDIS_SWITCH_NIC_INDEX nicIndex)
 {
     POVS_VPORT_ENTRY vport;
     LOCK_STATE_EX lockState;
@@ -114,7 +121,7 @@ HvCreatePort(POVS_SWITCH_CONTEXT switchContext,
     NdisAcquireRWLockWrite(switchContext->dispatchLock, &lockState, 0);
     /* Lookup by port ID. */
     vport = OvsFindVportByPortIdAndNicIndex(switchContext,
-                                            portParam->PortId, 0);
+                                            portParam->PortId, nicIndex);
     if (vport != NULL) {
         OVS_LOG_ERROR("Port add failed due to duplicate port name, "
                       "port Id: %u", portParam->PortId);
@@ -163,7 +170,8 @@ HvCreatePort(POVS_SWITCH_CONTEXT switchContext,
         newPort = TRUE;
     }
     OvsInitVportWithPortParam(vport, portParam);
-    InitHvVportCommon(switchContext, vport, newPort);
+    vport->nicIndex = nicIndex;
+    UpdateSwitchCtxWithVport(switchContext, vport, newPort);
 
 create_port_done:
     NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
@@ -173,7 +181,9 @@ create_port_done:
 
 
 /*
- * Function updating the port properties
+ * --------------------------------------------------------------------------
+ * Function to process updates to a port on the Hyper-Vs witch.
+ * --------------------------------------------------------------------------
  */
 NDIS_STATUS
 HvUpdatePort(POVS_SWITCH_CONTEXT switchContext,
@@ -226,6 +236,12 @@ update_port_done:
     return NDIS_STATUS_SUCCESS;
 }
 
+
+/*
+ * --------------------------------------------------------------------------
+ * Function to process teardown of a port on the Hyper-V switch.
+ * --------------------------------------------------------------------------
+ */
 VOID
 HvTeardownPort(POVS_SWITCH_CONTEXT switchContext,
                PNDIS_SWITCH_PORT_PARAMETERS portParam)
@@ -250,7 +266,11 @@ HvTeardownPort(POVS_SWITCH_CONTEXT switchContext,
     VPORT_PORT_EXIT(portParam);
 }
 
-
+/*
+ * --------------------------------------------------------------------------
+ * Function to process deletion of a port on the Hyper-V switch.
+ * --------------------------------------------------------------------------
+ */
 VOID
 HvDeletePort(POVS_SWITCH_CONTEXT switchContext,
              PNDIS_SWITCH_PORT_PARAMETERS portParams)
@@ -282,17 +302,19 @@ HvDeletePort(POVS_SWITCH_CONTEXT switchContext,
 
 
 /*
- * Functions implemented in relaton to NDIS NIC manipulation.
+ * --------------------------------------------------------------------------
+ * Function to process addition of a NIC connection on the Hyper-V switch.
+ * XXX: Posting an event to DPIF is incorrect here. However, it might be useful
+ * to post an event to netdev-windows.c.
+ * --------------------------------------------------------------------------
  */
 NDIS_STATUS
 HvCreateNic(POVS_SWITCH_CONTEXT switchContext,
             PNDIS_SWITCH_NIC_PARAMETERS nicParam)
 {
     POVS_VPORT_ENTRY vport;
-    UINT32 portNo = 0;
-    UINT32 event = 0;
     NDIS_STATUS status = NDIS_STATUS_SUCCESS;
-
+    IF_COUNTED_STRING portFriendlyName = {0};
     LOCK_STATE_EX lockState;
 
     VPORT_NIC_ENTER(nicParam);
@@ -307,46 +329,54 @@ HvCreateNic(POVS_SWITCH_CONTEXT switchContext,
         goto done;
     }
 
-    NdisAcquireRWLockWrite(switchContext->dispatchLock, &lockState, 0);
-    vport = OvsFindVportByPortIdAndNicIndex(switchContext, nicParam->PortId, 0);
-    if (vport == NULL) {
-        OVS_LOG_ERROR("Create NIC without Switch Port,"
-                      " PortId: %x, NicIndex: %d",
-                      nicParam->PortId, nicParam->NicIndex);
-        status = NDIS_STATUS_INVALID_PARAMETER;
-        goto add_nic_done;
+    if (OvsIsInternalNIC(nicParam->NicType) ||
+        OvsIsRealExternalNIC(nicParam->NicType, nicParam->NicIndex)) {
+        GetNICAlias(&nicParam->NetCfgInstanceId, &portFriendlyName);
     }
 
-    if (nicParam->NicType == NdisSwitchNicTypeExternal &&
-        nicParam->NicIndex != 0) {
+    NdisAcquireRWLockWrite(switchContext->dispatchLock, &lockState, 0);
+    /*
+     * There can be one or more NICs for the external port. We create a vport
+     * structure for each such NIC, and each NIC inherits a lot of properties
+     * from the parent external port.
+     */
+    if (OvsIsRealExternalNIC(nicParam->NicType, nicParam->NicIndex)) {
+        NDIS_SWITCH_PORT_PARAMETERS portParam;
         POVS_VPORT_ENTRY virtExtVport =
             (POVS_VPORT_ENTRY)switchContext->virtualExternalVport;
 
-        vport = (POVS_VPORT_ENTRY)OvsAllocateVport();
-        if (vport == NULL) {
-            status = NDIS_STATUS_RESOURCES;
-            goto add_nic_done;
-        }
-        OvsInitPhysNicVport(vport, virtExtVport, nicParam->NicIndex);
-        status = InitHvVportCommon(switchContext, vport, TRUE);
+        ASSERT(virtExtVport);
+        ASSERT(OvsFindVportByPortIdAndNicIndex(switchContext,
+                                               nicParam->PortId,
+                                               nicParam->NicIndex) == NULL);
+        OvsCopyPortParamsFromVport(virtExtVport, &portParam);
+        NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
+        status = HvCreatePort(switchContext, &portParam,
+                              nicParam->NicIndex);
+        NdisAcquireRWLockWrite(switchContext->dispatchLock, &lockState, 0);
         if (status != NDIS_STATUS_SUCCESS) {
-            OvsFreeMemoryWithTag(vport, OVS_VPORT_POOL_TAG);
             goto add_nic_done;
         }
     }
+
+    vport = OvsFindVportByPortIdAndNicIndex(switchContext, nicParam->PortId,
+                                            nicParam->NicIndex);
+    if (vport == NULL) {
+        OVS_LOG_ERROR("Create NIC without Switch Port,"
+                      " PortId: %x, NicIndex: %d",
+                      nicParam->PortId, nicParam->NicIndex);
+        status = NDIS_STATUS_INVALID_PARAMETER;
+        goto add_nic_done;
+    }
     OvsInitVportWithNicParam(switchContext, vport, nicParam);
-    portNo = vport->portNo;
-    if (vport->ovsState == OVS_STATE_CONNECTED) {
-        event = OVS_EVENT_CONNECT | OVS_EVENT_LINK_UP;
-    } else if (vport->ovsState == OVS_STATE_NIC_CREATED) {
-        event = OVS_EVENT_CONNECT;
+    if (OvsIsInternalNIC(nicParam->NicType) ||
+        OvsIsRealExternalNIC(nicParam->NicType, nicParam->NicIndex)) {
+        RtlCopyMemory(&vport->portFriendlyName, &portFriendlyName,
+                      sizeof portFriendlyName);
     }
 
 add_nic_done:
     NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
-    if (portNo != OVS_DPPORT_NUMBER_INVALID && event) {
-        OvsPostEvent(portNo, event);
-    }
 
 done:
     VPORT_NIC_EXIT(nicParam);
@@ -355,15 +385,18 @@ done:
     return status;
 }
 
-
-/* Mark already created NIC as connected. */
+/*
+ * --------------------------------------------------------------------------
+ * Function to process connection event of a NIC on the Hyper-V switch.
+ * --------------------------------------------------------------------------
+ */
 VOID
 HvConnectNic(POVS_SWITCH_CONTEXT switchContext,
              PNDIS_SWITCH_NIC_PARAMETERS nicParam)
 {
     LOCK_STATE_EX lockState;
     POVS_VPORT_ENTRY vport;
-    UINT32 portNo = 0;
+    UINT32 portNo;
 
     VPORT_NIC_ENTER(nicParam);
 
@@ -393,25 +426,30 @@ HvConnectNic(POVS_SWITCH_CONTEXT switchContext,
 
     NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
 
-    /* XXX only if portNo != INVALID or always? */
-    OvsPostEvent(portNo, OVS_EVENT_LINK_UP);
-
     if (nicParam->NicType == NdisSwitchNicTypeInternal) {
-        OvsInternalAdapterUp(portNo, &nicParam->NetCfgInstanceId);
+        OvsInternalAdapterUp(&nicParam->NetCfgInstanceId);
     }
 
 done:
     VPORT_NIC_EXIT(nicParam);
 }
 
+
+/*
+ * --------------------------------------------------------------------------
+ * Function to process updates to a NIC on the Hyper-V switch.
+ * --------------------------------------------------------------------------
+ */
 VOID
 HvUpdateNic(POVS_SWITCH_CONTEXT switchContext,
             PNDIS_SWITCH_NIC_PARAMETERS nicParam)
 {
     POVS_VPORT_ENTRY vport;
     LOCK_STATE_EX lockState;
-
-    UINT32 status = 0, portNo = 0;
+    UINT32 event = 0;
+    IF_COUNTED_STRING portFriendlyName = {0};
+    BOOLEAN nameChanged = FALSE;
+    BOOLEAN aliasLookup = FALSE;
 
     VPORT_NIC_ENTER(nicParam);
 
@@ -423,6 +461,13 @@ HvUpdateNic(POVS_SWITCH_CONTEXT switchContext,
         goto update_nic_done;
     }
 
+    /* GetNICAlias() must be called outside of a lock. */
+    if (nicParam->NicType == NdisSwitchNicTypeInternal ||
+        OvsIsRealExternalNIC(nicParam->NicType, nicParam->NicIndex)) {
+        GetNICAlias(&nicParam->NetCfgInstanceId, &portFriendlyName);
+        aliasLookup = TRUE;
+    }
+
     NdisAcquireRWLockWrite(switchContext->dispatchLock, &lockState, 0);
     vport = OvsFindVportByPortIdAndNicIndex(switchContext,
                                             nicParam->PortId,
@@ -437,13 +482,21 @@ HvUpdateNic(POVS_SWITCH_CONTEXT switchContext,
     case NdisSwitchNicTypeInternal:
         RtlCopyMemory(&vport->netCfgInstanceId, &nicParam->NetCfgInstanceId,
                       sizeof (GUID));
-        AssignNicNameSpecial(vport);
+        if (aliasLookup) {
+            if (RtlCompareMemory(&vport->portFriendlyName,
+                    &portFriendlyName, vport->portFriendlyName.Length) !=
+                    vport->portFriendlyName.Length) {
+                RtlCopyMemory(&vport->portFriendlyName, &portFriendlyName,
+                    sizeof portFriendlyName);
+                nameChanged = TRUE;
+            }
+        }
         break;
     case NdisSwitchNicTypeSynthetic:
     case NdisSwitchNicTypeEmulated:
         if (!RtlEqualMemory(vport->vmMacAddress, nicParam->VMMacAddress,
                            sizeof (vport->vmMacAddress))) {
-            status |= OVS_EVENT_MAC_CHANGE;
+            event |= OVS_EVENT_MAC_CHANGE;
             RtlCopyMemory(vport->vmMacAddress, nicParam->VMMacAddress,
                           sizeof (vport->vmMacAddress));
         }
@@ -455,39 +508,59 @@ HvUpdateNic(POVS_SWITCH_CONTEXT switchContext,
                         sizeof (vport->permMacAddress))) {
         RtlCopyMemory(vport->permMacAddress, nicParam->PermanentMacAddress,
                       sizeof (vport->permMacAddress));
-        status |= OVS_EVENT_MAC_CHANGE;
+        event |= OVS_EVENT_MAC_CHANGE;
     }
     if (!RtlEqualMemory(vport->currMacAddress, nicParam->CurrentMacAddress,
                         sizeof (vport->currMacAddress))) {
         RtlCopyMemory(vport->currMacAddress, nicParam->CurrentMacAddress,
                       sizeof (vport->currMacAddress));
-        status |= OVS_EVENT_MAC_CHANGE;
+        event |= OVS_EVENT_MAC_CHANGE;
     }
 
     if (vport->mtu != nicParam->MTU) {
         vport->mtu = nicParam->MTU;
-        status |= OVS_EVENT_MTU_CHANGE;
+        event |= OVS_EVENT_MTU_CHANGE;
     }
     vport->numaNodeId = nicParam->NumaNodeId;
-    portNo = vport->portNo;
 
-    NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
-    if (status && portNo) {
-        OvsPostEvent(portNo, status);
+    if (nameChanged) {
+        OVS_EVENT_ENTRY event;
+        event.portNo = vport->portNo;
+        event.ovsType = vport->ovsType;
+        event.upcallPid = vport->upcallPid;
+        RtlCopyMemory(&event.ovsName, &vport->ovsName, sizeof event.ovsName);
+        event.type = OVS_EVENT_LINK_DOWN;
+        OvsRemoveAndDeleteVport(NULL, switchContext, vport, FALSE, TRUE);
+        OvsPostEvent(&event);
     }
+
+    NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
+
+    /*
+     * XXX: Not sure what kind of event to post here. DPIF is not interested in
+     * changes to MAC address. Netdev-windows might be intrested, though.
+     * That said, if the name chagnes, not clear what kind of event to be
+     * posted. We might have to delete the vport, and have userspace recreate
+     * it.
+     */
+
 update_nic_done:
     VPORT_NIC_EXIT(nicParam);
 }
 
-
+/*
+ * --------------------------------------------------------------------------
+ * Function to process disconnect event of a NIC on the Hyper-V switch.
+ * --------------------------------------------------------------------------
+ */
 VOID
 HvDisconnectNic(POVS_SWITCH_CONTEXT switchContext,
                 PNDIS_SWITCH_NIC_PARAMETERS nicParam)
 {
     POVS_VPORT_ENTRY vport;
-    UINT32 portNo = 0;
     LOCK_STATE_EX lockState;
     BOOLEAN isInternalPort = FALSE;
+    OVS_EVENT_ENTRY event;
 
     VPORT_NIC_ENTER(nicParam);
 
@@ -512,16 +585,26 @@ HvDisconnectNic(POVS_SWITCH_CONTEXT switchContext,
 
     vport->nicState = NdisSwitchNicStateDisconnected;
     vport->ovsState = OVS_STATE_NIC_CREATED;
-    portNo = vport->portNo;
 
     if (vport->ovsType == OVS_VPORT_TYPE_INTERNAL) {
         isInternalPort = TRUE;
     }
 
-    NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
+    event.portNo = vport->portNo;
+    event.ovsType = vport->ovsType;
+    event.upcallPid = vport->upcallPid;
+    RtlCopyMemory(&event.ovsName, &vport->ovsName, sizeof event.ovsName);
+    event.type = OVS_EVENT_LINK_DOWN;
 
-    /* XXX if portNo != INVALID or always? */
-    OvsPostEvent(portNo, OVS_EVENT_LINK_DOWN);
+    /*
+     * Delete the port from the hash tables accessible to userspace. After this
+     * point, userspace should not be able to access this port.
+     */
+    if (OvsIsRealExternalVport(vport)) {
+        OvsRemoveAndDeleteVport(NULL, switchContext, vport, FALSE, TRUE);
+        OvsPostEvent(&event);
+    }
+    NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
 
     if (isInternalPort) {
         OvsInternalAdapterDown();
@@ -531,14 +614,17 @@ done:
     VPORT_NIC_EXIT(nicParam);
 }
 
-
+/*
+ * --------------------------------------------------------------------------
+ * Function to process delete event of a NIC on the Hyper-V switch.
+ * --------------------------------------------------------------------------
+ */
 VOID
 HvDeleteNic(POVS_SWITCH_CONTEXT switchContext,
             PNDIS_SWITCH_NIC_PARAMETERS nicParam)
 {
     LOCK_STATE_EX lockState;
     POVS_VPORT_ENTRY vport;
-    UINT32 portNo = 0;
 
     VPORT_NIC_ENTER(nicParam);
     /* Wait for lists to be initialized. */
@@ -563,21 +649,17 @@ HvDeleteNic(POVS_SWITCH_CONTEXT switchContext,
     vport->nicState = NdisSwitchNicStateUnknown;
     vport->ovsState = OVS_STATE_PORT_CREATED;
 
-    portNo = vport->portNo;
-    if (vport->portType == NdisSwitchPortTypeExternal &&
-        vport->nicIndex != 0) {
+    if (OvsIsRealExternalVport(vport)) {
+        /* This vport was created in HvCreateNic(). */
         OvsRemoveAndDeleteVport(NULL, switchContext, vport, TRUE, FALSE);
     }
 
     NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
-    /* XXX if portNo != INVALID or always? */
-    OvsPostEvent(portNo, OVS_EVENT_DISCONNECT);
 
 done:
     VPORT_NIC_EXIT(nicParam);
 }
 
-
 /*
  * OVS Vport related functionality.
  */
@@ -620,6 +702,24 @@ OvsFindTunnelVportByDstPort(POVS_SWITCH_CONTEXT switchContext,
     return NULL;
 }
 
+POVS_VPORT_ENTRY
+OvsFindTunnelVportByPortType(POVS_SWITCH_CONTEXT switchContext,
+                             OVS_VPORT_TYPE ovsPortType)
+{
+    POVS_VPORT_ENTRY vport;
+    PLIST_ENTRY head, link;
+    UINT16 dstPort = 0;
+    UINT32 hash = OvsJhashBytes((const VOID *)&dstPort, sizeof(dstPort),
+                                OVS_HASH_BASIS);
+    head = &(switchContext->tunnelVportsArray[hash & OVS_VPORT_MASK]);
+    LIST_FORALL(head, link) {
+        vport = CONTAINING_RECORD(link, OVS_VPORT_ENTRY, tunnelVportLink);
+        if (vport->ovsType == ovsPortType) {
+            return vport;
+        }
+    }
+    return NULL;
+}
 
 POVS_VPORT_ENTRY
 OvsFindVportByOvsName(POVS_SWITCH_CONTEXT switchContext,
@@ -843,6 +943,7 @@ OvsInitVportWithNicParam(POVS_SWITCH_CONTEXT switchContext,
     vport->mtu = nicParam->MTU;
     vport->nicState = nicParam->NicState;
     vport->nicIndex = nicParam->NicIndex;
+    vport->nicType = nicParam->NicType;
     vport->numaNodeId = nicParam->NumaNodeId;
 
     switch (vport->nicState) {
@@ -863,33 +964,23 @@ OvsInitVportWithNicParam(POVS_SWITCH_CONTEXT switchContext,
 
 /*
  * --------------------------------------------------------------------------
- * Copies the relevant NDIS port properties from a virtual (pseudo) external
- * NIC to a physical (real) external NIC.
+ * Populates 'portParam' based on 'vport'.
  * --------------------------------------------------------------------------
  */
 static VOID
-OvsInitPhysNicVport(POVS_VPORT_ENTRY physExtVport,
-                    POVS_VPORT_ENTRY virtExtVport,
-                    UINT32 physNicIndex)
+OvsCopyPortParamsFromVport(POVS_VPORT_ENTRY vport,
+                           PNDIS_SWITCH_PORT_PARAMETERS portParam)
 {
-    physExtVport->portType = virtExtVport->portType;
-    physExtVport->portState = virtExtVport->portState;
-    physExtVport->portId = virtExtVport->portId;
-    physExtVport->nicState = NdisSwitchNicStateUnknown;
-    physExtVport->ovsType = OVS_VPORT_TYPE_NETDEV;
-    physExtVport->isExternal = TRUE;
-    physExtVport->isBridgeInternal = FALSE;
-    physExtVport->nicIndex = (NDIS_SWITCH_NIC_INDEX)physNicIndex;
-
-    RtlCopyMemory(&physExtVport->hvPortName, &virtExtVport->hvPortName,
+    portParam->Flags = 0;
+    portParam->PortId = vport->portId;
+    RtlCopyMemory(&portParam->PortName, &vport->hvPortName,
                   sizeof (NDIS_SWITCH_PORT_NAME));
-
-    /* 'portFriendlyName' is overwritten later. */
-    RtlCopyMemory(&physExtVport->portFriendlyName,
-                  &virtExtVport->portFriendlyName,
+    RtlCopyMemory(&portParam->PortFriendlyName,
+                  &vport->portFriendlyName,
                   sizeof(NDIS_SWITCH_PORT_FRIENDLYNAME));
-
-    physExtVport->ovsState = OVS_STATE_PORT_CREATED;
+    portParam->PortType = vport->portType;
+    portParam->IsValidationPort = FALSE;
+    portParam->PortState = vport->portState;
 }
 
 /*
@@ -912,6 +1003,7 @@ OvsInitTunnelVport(PVOID userContext,
     vport->ovsState = OVS_STATE_PORT_CREATED;
     switch (ovsType) {
     case OVS_VPORT_TYPE_GRE:
+        status = OvsInitGreTunnel(vport);
         break;
     case OVS_VPORT_TYPE_VXLAN:
     {
@@ -971,43 +1063,40 @@ OvsInitBridgeInternalVport(POVS_VPORT_ENTRY vport)
  * Hyper-V, is overwritten with the interface alias name.
  * --------------------------------------------------------------------------
  */
-static VOID
-AssignNicNameSpecial(POVS_VPORT_ENTRY vport)
+static NTSTATUS
+GetNICAlias(GUID *netCfgInstanceId,
+            IF_COUNTED_STRING *portFriendlyName)
 {
     NTSTATUS status = STATUS_SUCCESS;
     WCHAR interfaceName[IF_MAX_STRING_SIZE] = { 0 };
     NET_LUID interfaceLuid = { 0 };
     size_t len = 0;
 
-    ASSERT(vport->portType == NdisSwitchPortTypeExternal || 
-           vport->portType == NdisSwitchPortTypeInternal);
-
-    status = ConvertInterfaceGuidToLuid(&vport->netCfgInstanceId,
+    status = ConvertInterfaceGuidToLuid(netCfgInstanceId,
                                         &interfaceLuid);
     if (status == STATUS_SUCCESS) {
+        /*
+         * Must be called from PASSIVE_LEVEL. Resulted in a
+         * STATUS_INVALID_DEVICE_REQUEST if not.
+         */
         status = ConvertInterfaceLuidToAlias(&interfaceLuid, interfaceName,
                                              IF_MAX_STRING_SIZE + 1);
         if (status == STATUS_SUCCESS) {
-            if (vport->portType == NdisSwitchPortTypeExternal &&
-                vport->nicIndex == 0) {
-                RtlStringCbPrintfW(vport->portFriendlyName.String, IF_MAX_STRING_SIZE,
-                                   L"%s.virtualAdapter", interfaceName);
-            } else {
-                RtlStringCbPrintfW(vport->portFriendlyName.String,
-                                   IF_MAX_STRING_SIZE, L"%s", interfaceName);
-            }
-
-            RtlStringCbLengthW(vport->portFriendlyName.String, IF_MAX_STRING_SIZE,
+            RtlStringCbPrintfW(portFriendlyName->String,
+                               IF_MAX_STRING_SIZE, L"%s", interfaceName);
+            RtlStringCbLengthW(portFriendlyName->String, IF_MAX_STRING_SIZE,
                                &len);
-            vport->portFriendlyName.Length = (USHORT)len;
+            portFriendlyName->Length = (USHORT)len;
         } else {
-            OVS_LOG_INFO("Fail to convert interface LUID to alias, status: %x",
+            OVS_LOG_ERROR("Fail to convert interface LUID to alias, status: %x",
                 status);
         }
     } else {
-        OVS_LOG_INFO("Fail to convert interface GUID to LUID, status: %x",
+        OVS_LOG_ERROR("Fail to convert interface GUID to LUID, status: %x",
                       status);
     }
+
+    return status;
 }
 
 
@@ -1018,26 +1107,17 @@ AssignNicNameSpecial(POVS_VPORT_ENTRY vport)
  *
  * Inserts the port into 'portIdHashArray' and caches the pointer in the
  * 'switchContext' if needed.
- *
- * For external NIC, assigns the name for the NIC.
  * --------------------------------------------------------------------------
  */
-static NDIS_STATUS
-InitHvVportCommon(POVS_SWITCH_CONTEXT switchContext,
-                  POVS_VPORT_ENTRY vport,
-                  BOOLEAN newPort)
+static VOID
+UpdateSwitchCtxWithVport(POVS_SWITCH_CONTEXT switchContext,
+                         POVS_VPORT_ENTRY vport,
+                         BOOLEAN newPort)
 {
     UINT32 hash;
 
     switch (vport->portType) {
     case NdisSwitchPortTypeExternal:
-        /*
-         * Overwrite the 'portFriendlyName' of this external vport. The reason
-         * for having this in common code is to be able to call it from the NDIS
-         * Port callback as well as the NDIS NIC callback.
-         */
-        AssignNicNameSpecial(vport);
-
         if (vport->nicIndex == 0) {
             switchContext->virtualExternalPortId = vport->portId;
             switchContext->virtualExternalVport = vport;
@@ -1047,9 +1127,6 @@ InitHvVportCommon(POVS_SWITCH_CONTEXT switchContext,
         break;
     case NdisSwitchPortTypeInternal:
         ASSERT(vport->isBridgeInternal == FALSE);
-
-        /* Overwrite the 'portFriendlyName' of the internal vport. */
-        AssignNicNameSpecial(vport);
         switchContext->internalPortId = vport->portId;
         switchContext->internalVport = vport;
         break;
@@ -1065,7 +1142,7 @@ InitHvVportCommon(POVS_SWITCH_CONTEXT switchContext,
      */
     if (vport->portType == NdisSwitchPortTypeExternal &&
         vport->nicIndex == 0) {
-        return NDIS_STATUS_SUCCESS;
+        return;
     }
 
     /*
@@ -1079,7 +1156,7 @@ InitHvVportCommon(POVS_SWITCH_CONTEXT switchContext,
     if (newPort) {
         switchContext->numHvVports++;
     }
-    return NDIS_STATUS_SUCCESS;
+    return;
 }
 
 /*
@@ -1097,6 +1174,7 @@ InitOvsVportCommon(POVS_SWITCH_CONTEXT switchContext,
     UINT32 hash;
 
     switch(vport->ovsType) {
+    case OVS_VPORT_TYPE_GRE:
     case OVS_VPORT_TYPE_VXLAN:
     case OVS_VPORT_TYPE_STT:
     {
@@ -1141,7 +1219,7 @@ InitOvsVportCommon(POVS_SWITCH_CONTEXT switchContext,
 /*
  * --------------------------------------------------------------------------
  * Provides functionality that is partly complementatry to
- * InitOvsVportCommon()/InitHvVportCommon().
+ * InitOvsVportCommon()/UpdateSwitchCtxWithVport().
  *
  * 'hvDelete' indicates if caller is removing the vport as a result of the
  * port being removed on the Hyper-V switch.
@@ -1186,6 +1264,7 @@ OvsRemoveAndDeleteVport(PVOID usrParamsContext,
         OvsCleanupSttTunnel(vport);
         break;
     case OVS_VPORT_TYPE_GRE:
+        OvsCleanupGreTunnel(vport);
         break;
     case OVS_VPORT_TYPE_NETDEV:
         if (vport->isExternal) {
@@ -1243,7 +1322,8 @@ OvsRemoveAndDeleteVport(PVOID usrParamsContext,
         RemoveEntryList(&vport->portNoLink);
         InitializeListHead(&vport->portNoLink);
         if (OVS_VPORT_TYPE_VXLAN == vport->ovsType ||
-            OVS_VPORT_TYPE_STT == vport->ovsType) {
+            OVS_VPORT_TYPE_STT == vport->ovsType   ||
+            OVS_VPORT_TYPE_GRE == vport->ovsType) {
             RemoveEntryList(&vport->tunnelVportLink);
             InitializeListHead(&vport->tunnelVportLink);
         }
@@ -1301,8 +1381,11 @@ OvsRemoveTunnelVport(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
                                  tunnelContext);
 }
 
-
-
+/*
+ * --------------------------------------------------------------------------
+ * Enumerates the ports on the Hyper-V switch.
+ * --------------------------------------------------------------------------
+ */
 NDIS_STATUS
 OvsAddConfiguredSwitchPorts(POVS_SWITCH_CONTEXT switchContext)
 {
@@ -1310,7 +1393,6 @@ OvsAddConfiguredSwitchPorts(POVS_SWITCH_CONTEXT switchContext)
     ULONG arrIndex;
     PNDIS_SWITCH_PORT_PARAMETERS portParam;
     PNDIS_SWITCH_PORT_ARRAY portArray = NULL;
-    POVS_VPORT_ENTRY vport;
 
     OVS_LOG_TRACE("Enter: switchContext:%p", switchContext);
 
@@ -1326,16 +1408,9 @@ OvsAddConfiguredSwitchPorts(POVS_SWITCH_CONTEXT switchContext)
              continue;
          }
 
-         vport = (POVS_VPORT_ENTRY)OvsAllocateVport();
-         if (vport == NULL) {
-             status = NDIS_STATUS_RESOURCES;
-             goto cleanup;
-         }
-         OvsInitVportWithPortParam(vport, portParam);
-         status = InitHvVportCommon(switchContext, vport, TRUE);
-         if (status != NDIS_STATUS_SUCCESS) {
-             OvsFreeMemoryWithTag(vport, OVS_VPORT_POOL_TAG);
-             goto cleanup;
+         status = HvCreatePort(switchContext, portParam, 0);
+         if (status != STATUS_SUCCESS && status != STATUS_DATA_NOT_ACCEPTED) {
+             break;
          }
     }
 
@@ -1351,7 +1426,11 @@ cleanup:
     return status;
 }
 
-
+/*
+ * --------------------------------------------------------------------------
+ * Enumerates the NICs on the Hyper-V switch.
+ * --------------------------------------------------------------------------
+ */
 NDIS_STATUS
 OvsInitConfiguredSwitchNics(POVS_SWITCH_CONTEXT switchContext)
 {
@@ -1359,7 +1438,6 @@ OvsInitConfiguredSwitchNics(POVS_SWITCH_CONTEXT switchContext)
     PNDIS_SWITCH_NIC_ARRAY nicArray = NULL;
     ULONG arrIndex;
     PNDIS_SWITCH_NIC_PARAMETERS nicParam;
-    POVS_VPORT_ENTRY vport;
 
     OVS_LOG_TRACE("Enter: switchContext: %p", switchContext);
     /*
@@ -1370,63 +1448,18 @@ OvsInitConfiguredSwitchNics(POVS_SWITCH_CONTEXT switchContext)
         goto cleanup;
     }
     for (arrIndex = 0; arrIndex < nicArray->NumElements; ++arrIndex) {
-
         nicParam = NDIS_SWITCH_NIC_AT_ARRAY_INDEX(nicArray, arrIndex);
 
         /*
          * XXX: Check if the port is configured with a VLAN. Disallow such a
          * configuration, since we don't support tag-in-tag.
-         */
-
-        /*
          * XXX: Check if the port is connected to a VF. Disconnect the VF in
          * such a case.
          */
 
-        if (nicParam->NicType == NdisSwitchNicTypeExternal &&
-            nicParam->NicIndex != 0) {
-            POVS_VPORT_ENTRY virtExtVport =
-                   (POVS_VPORT_ENTRY)switchContext->virtualExternalVport;
-
-            vport = OvsAllocateVport();
-            if (vport) {
-                OvsInitPhysNicVport(vport, virtExtVport,
-                                    nicParam->NicIndex);
-                OvsInitVportWithNicParam(switchContext, vport, nicParam);
-                status = InitHvVportCommon(switchContext, vport, TRUE);
-                if (status != NDIS_STATUS_SUCCESS) {
-                    OvsFreeMemoryWithTag(vport, OVS_VPORT_POOL_TAG);
-                    vport = NULL;
-                }
-            } else {
-                OVS_LOG_ERROR("Fail to allocate vport.");
-                continue;
-            }
-        } else {
-            vport = OvsFindVportByPortIdAndNicIndex(switchContext,
-                                                    nicParam->PortId,
-                                                    nicParam->NicIndex);
-            if (vport == NULL) {
-                OVS_LOG_ERROR(
-                    "Could not found vport with portId: %d and nicIndex: %d.",
-                    nicParam->PortId, nicParam->NicIndex);
-                continue;
-            }
-            OvsInitVportWithNicParam(switchContext, vport, nicParam);
-        }
-
-        if (nicParam->NicType == NdisSwitchNicTypeInternal) {
-            /*
-             * Overwrite the 'portFriendlyName' of the internal vport. 
-             * Note:
-             * The call to AssignNicNameSpecial() is needed here, because the
-             * necessary 'netCfgInstanceId' of the vport is available.
-             * On port creation the latter information is missing and the
-             * 'portFriendlyName' of the vport fails to be overwritten with the
-             * correct information.
-             */
-            AssignNicNameSpecial(vport);
-            OvsInternalAdapterUp(vport->portNo, &nicParam->NetCfgInstanceId);
+        status = HvCreateNic(switchContext, nicParam);
+        if (status == NDIS_STATUS_SUCCESS) {
+            HvConnectNic(switchContext, nicParam);
         }
     }
 cleanup:
@@ -2181,6 +2214,8 @@ OvsNewVportCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
             UINT16 transportPortDest = 0;
 
             switch (portType) {
+            case OVS_VPORT_TYPE_GRE:
+                break;
             case OVS_VPORT_TYPE_VXLAN:
                 transportPortDest = VXLAN_UDP_PORT;
                 break;
@@ -2188,7 +2223,8 @@ OvsNewVportCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
                 transportPortDest = STT_TCP_PORT;
                 break;
             default:
-                break;
+                nlError = NL_ERROR_INVAL;
+                goto Cleanup;
             }
 
             if (vportAttrs[OVS_VPORT_ATTR_OPTIONS]) {