[ovs-dev] [PATCH v2 2/3] datapath-windows: Add multiple switch internal ports

Alin Serdean aserdean at cloudbasesolutions.com
Sat Mar 12 21:27:01 UTC 2016


This patch adds multiple internal ports support to the windows datapath.
All tunnels types have been updated to accommodate this new functionality.

Signed-off-by: Alin Gabriel Serdean <aserdean at cloudbasesolutions.com>
Co-authored-by: Sorin Vinturis <svinturis at cloudbasesolutions.com>
---
v2: change title
---
---
 datapath-windows/ovsext/Actions.c  |  35 +-
 datapath-windows/ovsext/Gre.c      |   7 +-
 datapath-windows/ovsext/Gre.h      |   5 +-
 datapath-windows/ovsext/IpHelper.c | 833 ++++++++++++++++++++++++++++---------
 datapath-windows/ovsext/IpHelper.h |  17 +-
 datapath-windows/ovsext/PacketIO.h |   3 +-
 datapath-windows/ovsext/Stt.c      |   5 +-
 datapath-windows/ovsext/Stt.h      |   6 +-
 datapath-windows/ovsext/Switch.h   |   7 +-
 datapath-windows/ovsext/Vport.c    |  56 +--
 datapath-windows/ovsext/Vport.h    |  78 ++--
 datapath-windows/ovsext/Vxlan.c    |   8 +-
 datapath-windows/ovsext/Vxlan.h    |   7 +-
 13 files changed, 762 insertions(+), 305 deletions(-)

diff --git a/datapath-windows/ovsext/Actions.c b/datapath-windows/ovsext/Actions.c
index 5a04541..571213c 100644
--- a/datapath-windows/ovsext/Actions.c
+++ b/datapath-windows/ovsext/Actions.c
@@ -240,7 +240,6 @@ OvsDetectTunnelRxPkt(OvsForwardingContext *ovsFwdCtx,
 
     // We might get tunnel packets even before the tunnel gets initialized.
     if (tunnelVport) {
-        ASSERT(ovsFwdCtx->tunnelRxNic == NULL);
         ovsFwdCtx->tunnelRxNic = tunnelVport;
         return TRUE;
     }
@@ -284,7 +283,6 @@ OvsDetectTunnelPkt(OvsForwardingContext *ovsFwdCtx,
                  NDIS_SWITCH_DEFAULT_PORT_ID);
 
         if (validSrcPort && OvsDetectTunnelRxPkt(ovsFwdCtx, flowKey)) {
-            ASSERT(ovsFwdCtx->tunnelTxNic == NULL);
             ASSERT(ovsFwdCtx->tunnelRxNic != NULL);
             return TRUE;
         }
@@ -650,36 +648,31 @@ OvsTunnelPortTx(OvsForwardingContext *ovsFwdCtx)
      * Setup the source port to be the internal port to as to facilitate the
      * second OvsLookupFlow.
      */
-    if (ovsFwdCtx->switchContext->internalVport == NULL ||
+    if (ovsFwdCtx->switchContext->countInternalVports <= 0 ||
         ovsFwdCtx->switchContext->virtualExternalVport == NULL) {
         OvsClearTunTxCtx(ovsFwdCtx);
         OvsCompleteNBLForwardingCtx(ovsFwdCtx,
             L"OVS-Dropped since either internal or external port is absent");
         return NDIS_STATUS_FAILURE;
     }
-    ovsFwdCtx->srcVportNo =
-        ((POVS_VPORT_ENTRY)ovsFwdCtx->switchContext->internalVport)->portNo;
-
-    ovsFwdCtx->fwdDetail->SourcePortId = ovsFwdCtx->switchContext->internalPortId;
-    ovsFwdCtx->fwdDetail->SourceNicIndex =
-        ((POVS_VPORT_ENTRY)ovsFwdCtx->switchContext->internalVport)->nicIndex;
 
+    OVS_FWD_INFO switchFwdInfo = { 0 };
     /* Do the encap. Encap function does not consume the NBL. */
     switch(ovsFwdCtx->tunnelTxNic->ovsType) {
     case OVS_VPORT_TYPE_GRE:
         status = OvsEncapGre(ovsFwdCtx->tunnelTxNic, ovsFwdCtx->curNbl,
                              &ovsFwdCtx->tunKey, ovsFwdCtx->switchContext,
-                             &ovsFwdCtx->layers, &newNbl);
+                             &ovsFwdCtx->layers, &newNbl, &switchFwdInfo);
         break;
     case OVS_VPORT_TYPE_VXLAN:
         status = OvsEncapVxlan(ovsFwdCtx->tunnelTxNic, ovsFwdCtx->curNbl,
                                &ovsFwdCtx->tunKey, ovsFwdCtx->switchContext,
-                               &ovsFwdCtx->layers, &newNbl);
+                               &ovsFwdCtx->layers, &newNbl, &switchFwdInfo);
         break;
     case OVS_VPORT_TYPE_STT:
         status = OvsEncapStt(ovsFwdCtx->tunnelTxNic, ovsFwdCtx->curNbl,
                              &ovsFwdCtx->tunKey, ovsFwdCtx->switchContext,
-                             &ovsFwdCtx->layers, &newNbl);
+                             &ovsFwdCtx->layers, &newNbl, &switchFwdInfo);
         break;
     default:
         ASSERT(! "Tx: Unhandled tunnel type");
@@ -688,8 +681,11 @@ OvsTunnelPortTx(OvsForwardingContext *ovsFwdCtx)
     /* Reset the tunnel context so that it doesn't get used after this point. */
     OvsClearTunTxCtx(ovsFwdCtx);
 
-    if (status == NDIS_STATUS_SUCCESS) {
+    if (status == NDIS_STATUS_SUCCESS && switchFwdInfo.vport != NULL) {
         ASSERT(newNbl);
+        ovsFwdCtx->srcVportNo = switchFwdInfo.vport->portNo;
+        ovsFwdCtx->fwdDetail->SourcePortId = switchFwdInfo.vport->portId;
+        ovsFwdCtx->fwdDetail->SourceNicIndex = switchFwdInfo.vport->nicIndex;
         OvsCompleteNBLForwardingCtx(ovsFwdCtx,
                                     L"Complete after cloning NBL for encapsulation");
         ovsFwdCtx->curNbl = newNbl;
@@ -697,7 +693,7 @@ OvsTunnelPortTx(OvsForwardingContext *ovsFwdCtx)
         ASSERT(ovsFwdCtx->curNbl == NULL);
     } else {
         /*
-        * XXX: Temporary freeing of the packet until we register a
+         * XXX: Temporary freeing of the packet until we register a
          * callback to IP helper.
          */
         OvsCompleteNBLForwardingCtx(ovsFwdCtx,
@@ -929,13 +925,11 @@ dropit:
 VOID
 OvsLookupFlowOutput(POVS_SWITCH_CONTEXT switchContext,
                     VOID *compList,
-                    PNET_BUFFER_LIST curNbl)
+                    PNET_BUFFER_LIST curNbl,
+                    POVS_VPORT_ENTRY internalVport)
 {
     NDIS_STATUS status;
     OvsForwardingContext ovsFwdCtx;
-    POVS_VPORT_ENTRY internalVport =
-        (POVS_VPORT_ENTRY)switchContext->internalVport;
-
     /* XXX: make sure comp list was not a stack variable previously. */
     OvsCompletionList *completionList = (OvsCompletionList *)compList;
 
@@ -944,7 +938,7 @@ OvsLookupFlowOutput(POVS_SWITCH_CONTEXT switchContext,
      * It could, but will we get this callback from IP helper in that case. Need
      * to check.
      */
-    ASSERT(switchContext->internalVport);
+    ASSERT(switchContext->countInternalVports >= 0);
     status = OvsInitForwardingCtx(&ovsFwdCtx, switchContext, curNbl,
                                   internalVport->portNo, 0,
                                   NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(curNbl),
@@ -1088,6 +1082,9 @@ OvsPopFieldInPacketBuf(OvsForwardingContext *ovsFwdCtx,
     /* Bail out if L2 + shiftLength is not contiguous in the first buffer. */
     if (MIN(packetLen, mdlLen) < sizeof(EthHdr) + shiftLength) {
         ASSERT(FALSE);
+        OvsCompleteNBLForwardingCtx(ovsFwdCtx,
+                                    L"Dropped due to the buffer is not"
+                                    L"contiguous");
         return NDIS_STATUS_FAILURE;
     }
     bufferStart += NET_BUFFER_CURRENT_MDL_OFFSET(curNb);
diff --git a/datapath-windows/ovsext/Gre.c b/datapath-windows/ovsext/Gre.c
index cb41593..3933c60 100644
--- a/datapath-windows/ovsext/Gre.c
+++ b/datapath-windows/ovsext/Gre.c
@@ -96,7 +96,8 @@ OvsEncapGre(POVS_VPORT_ENTRY vport,
             OvsIPv4TunnelKey *tunKey,
             POVS_SWITCH_CONTEXT switchContext,
             POVS_PACKET_HDR_INFO layers,
-            PNET_BUFFER_LIST *newNbl)
+            PNET_BUFFER_LIST *newNbl,
+            POVS_FWD_INFO switchFwdInfo)
 {
     OVS_FWD_INFO fwdInfo;
     NDIS_STATUS status;
@@ -107,6 +108,8 @@ OvsEncapGre(POVS_VPORT_ENTRY vport,
         return NDIS_STATUS_FAILURE;
     }
 
+    RtlCopyMemory(switchFwdInfo->value, fwdInfo.value, sizeof fwdInfo.value);
+
     status = OvsDoEncapGre(vport, curNbl, tunKey, &fwdInfo, layers,
                            switchContext, newNbl);
     return status;
@@ -236,8 +239,6 @@ OvsDoEncapGre(POVS_VPORT_ENTRY vport,
                           IP_DF_NBO : 0;
         ipHdr->ttl = tunKey->ttl ? tunKey->ttl : 64;
         ipHdr->protocol = IPPROTO_GRE;
-        ASSERT(tunKey->dst == fwdInfo->dstIpAddr);
-        ASSERT(tunKey->src == fwdInfo->srcIpAddr || tunKey->src == 0);
         ipHdr->saddr = fwdInfo->srcIpAddr;
         ipHdr->daddr = fwdInfo->dstIpAddr;
 
diff --git a/datapath-windows/ovsext/Gre.h b/datapath-windows/ovsext/Gre.h
index d2472d9..54f6541 100644
--- a/datapath-windows/ovsext/Gre.h
+++ b/datapath-windows/ovsext/Gre.h
@@ -20,6 +20,8 @@
 #include "NetProto.h"
 #include "Flow.h"
 
+typedef union _OVS_FWD_INFO *POVS_FWD_INFO;
+
 typedef struct _OVS_GRE_VPORT {
     UINT64 ipId;
     /*
@@ -64,7 +66,8 @@ NDIS_STATUS OvsEncapGre(POVS_VPORT_ENTRY vport,
                         OvsIPv4TunnelKey *tunKey,
                         POVS_SWITCH_CONTEXT switchContext,
                         POVS_PACKET_HDR_INFO layers,
-                        PNET_BUFFER_LIST *newNbl);
+                        PNET_BUFFER_LIST *newNbl,
+                        POVS_FWD_INFO switchFwdInfo);
 
 NDIS_STATUS OvsDecapGre(POVS_SWITCH_CONTEXT switchContext,
                         PNET_BUFFER_LIST curNbl,
diff --git a/datapath-windows/ovsext/IpHelper.c b/datapath-windows/ovsext/IpHelper.c
index 8126222..3cf077d 100644
--- a/datapath-windows/ovsext/IpHelper.c
+++ b/datapath-windows/ovsext/IpHelper.c
@@ -19,6 +19,8 @@
 #include "Switch.h"
 #include "Jhash.h"
 
+extern POVS_SWITCH_CONTEXT gOvsSwitchContext;
+
 #ifdef OVS_DBG_MOD
 #undef OVS_DBG_MOD
 #endif
@@ -26,28 +28,45 @@
 #include "Debug.h"
 
 /*
- * Fow now, we assume only one internal adapter
+ * IpHelper supports multiple internal adapters.
  */
 
 KSTART_ROUTINE             OvsStartIpHelper;
 
 
+/* Contains the entries of internal adapter objects. */
+static LIST_ENTRY          ovsInstanceList;
+
+/* Passive-level lock used to protect the internal adapter object list. */
+static ERESOURCE           ovsInstanceListLock;
+
 /*
+ * This structure is used to define each adapter instance.
+ *
+ * Note:
  * Only when the internal IP is configured and virtual
  * internal port is connected, the IP helper request can be
  * queued.
+ *
+ * We only keep internal IP for reference, it will not be used for determining
+ * SRC IP of the Tunnel.
+ *
+ * The lock must not raise the IRQL higher than PASSIVE_LEVEL in order for the
+ * route manipulation functions, i.e. GetBestRoute, to work.
  */
-static BOOLEAN             ovsInternalIPConfigured;
-static BOOLEAN             ovsInternalAdapterUp;
-static GUID                ovsInternalNetCfgId;
-static MIB_IF_ROW2         ovsInternalRow;
-static MIB_IPINTERFACE_ROW ovsInternalIPRow;
-
-/* we only keep one internal IP for reference, it will not be used for
- * determining SRC IP of Tunnel
- */
-static UINT32               ovsInternalIP;
+typedef struct _OVS_IPHELPER_INSTANCE
+{
+    LIST_ENTRY          link;
+
+    BOOLEAN             isIpConfigured;
+    UINT32              portNo;
+    GUID                netCfgId;
+    MIB_IF_ROW2         internalRow;
+    MIB_IPINTERFACE_ROW internalIPRow;
+    UINT32              ipAddress;
 
+    ERESOURCE           lock;
+} OVS_IPHELPER_INSTANCE, *POVS_IPHELPER_INSTANCE;
 
 /*
  * FWD_ENTRY -------->  IPFORWARD_ENTRY
@@ -85,6 +104,9 @@ static VOID OvsRemoveAllFwdEntriesWithSrc(UINT32 ipAddr);
 static VOID OvsCleanupIpHelperRequestList(VOID);
 static VOID OvsCleanupFwdTable(VOID);
 static VOID OvsAddToSortedNeighList(POVS_IPNEIGH_ENTRY ipn);
+static POVS_IPHELPER_INSTANCE OvsIpHelperAllocateInstance(
+                                               POVS_IP_HELPER_REQUEST request);
+static VOID OvsIpHelperDeleteInstance(POVS_IPHELPER_INSTANCE instance);
 
 static VOID
 OvsDumpIfRow(PMIB_IF_ROW2 ifRow)
@@ -325,30 +347,65 @@ OvsDumpRoute(const SOCKADDR_INET *sourceAddress,
 
 
 NTSTATUS
-OvsGetRoute(NET_LUID interfaceLuid,
-            const SOCKADDR_INET *destinationAddress,
+OvsGetRoute(SOCKADDR_INET *destinationAddress,
             PMIB_IPFORWARD_ROW2 route,
-            SOCKADDR_INET *sourceAddress)
+            SOCKADDR_INET *sourceAddress,
+            POVS_IPHELPER_INSTANCE *instance,
+            POVS_VPORT_ENTRY* vport)
 {
-    NTSTATUS status;
+    NTSTATUS status = STATUS_NETWORK_UNREACHABLE;
+    NTSTATUS result = STATUS_SUCCESS;
+    PLIST_ENTRY head, link, next;
 
     if (destinationAddress == NULL || route == NULL) {
         return STATUS_INVALID_PARAMETER;
     }
 
-    status = GetBestRoute2(&interfaceLuid, 0,
-                           NULL, destinationAddress,
-                           0, route, sourceAddress);
+    ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+    head = &(ovsInstanceList);
+    LIST_FORALL_SAFE(head, link, next) {
+        ULONG minMetric = MAXULONG;
+        SOCKADDR_INET crtSrcAddr = { 0 };
+        MIB_IPFORWARD_ROW2 crtRoute = { 0 };
+        POVS_IPHELPER_INSTANCE crtInstance = NULL;
+        WCHAR interfaceName[IF_MAX_STRING_SIZE] = { 0 };
 
-    if (status != STATUS_SUCCESS) {
-        UINT32 ipAddr = destinationAddress->Ipv4.sin_addr.s_addr;
-        OVS_LOG_INFO("Fail to get route to %d.%d.%d.%d, status: %x",
-                     ipAddr & 0xff, (ipAddr >> 8) & 0xff,
-                     (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff, status);
-        return status;
+        crtInstance = CONTAINING_RECORD(link, OVS_IPHELPER_INSTANCE, link);
+
+        ExAcquireResourceExclusiveLite(&crtInstance->lock, TRUE);
+        result = GetBestRoute2(&crtInstance->internalRow.InterfaceLuid, 0,
+                               NULL, destinationAddress, 0, &crtRoute,
+                               &crtSrcAddr);
+
+        if (result != STATUS_SUCCESS) {
+            ExReleaseResourceLite(&crtInstance->lock);
+            continue;
+        }
+
+        if (minMetric > crtRoute.Metric) {
+            size_t len = 0;
+            minMetric = crtRoute.Metric;
+
+            RtlCopyMemory(sourceAddress, &crtSrcAddr, sizeof(*sourceAddress));
+            RtlCopyMemory(route, &crtRoute, sizeof(*route));
+            *instance = crtInstance;
+
+            ConvertInterfaceLuidToAlias(&crtInstance->internalRow.InterfaceLuid,
+                                        interfaceName, IF_MAX_STRING_SIZE + 1);
+            RtlStringCbLengthW(interfaceName, IF_MAX_STRING_SIZE, &len);
+
+            *vport = OvsFindVportByHvNameW(gOvsSwitchContext,
+                                           interfaceName,
+                                           len);
+
+            status = STATUS_SUCCESS;
+        }
+        ExReleaseResourceLite(&crtInstance->lock);
     }
+    ExReleaseResourceLite(&ovsInstanceListLock);
 
     OvsDumpRoute(sourceAddress, destinationAddress, route);
+
     return status;
 }
 
@@ -358,8 +415,8 @@ OvsDumpIPNeigh(PMIB_IPNET_ROW2 ipNeigh)
     UINT32 ipAddr = ipNeigh->Address.Ipv4.sin_addr.s_addr;
 
     OVS_LOG_INFO("Neigh: %d.%d.%d.%d",
-                     ipAddr & 0xff, (ipAddr >> 8) & 0xff,
-                     (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff);
+                 ipAddr & 0xff, (ipAddr >> 8) & 0xff,
+                 (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff);
     OVS_LOG_INFO("MAC Address: %02x:%02x:%02x:%02x:%02x:%02x",
                  ipNeigh->PhysicalAddress[0],
                  ipNeigh->PhysicalAddress[1],
@@ -421,7 +478,8 @@ OvsResolveIPNeighEntry(PMIB_IPNET_ROW2 ipNeigh)
 
 
 NTSTATUS
-OvsGetOrResolveIPNeigh(UINT32 ipAddr,
+OvsGetOrResolveIPNeigh(MIB_IF_ROW2 ipRow,
+                       UINT32 ipAddr,
                        PMIB_IPNET_ROW2 ipNeigh)
 {
     NTSTATUS status;
@@ -429,8 +487,8 @@ OvsGetOrResolveIPNeigh(UINT32 ipAddr,
     ASSERT(ipNeigh);
 
     RtlZeroMemory(ipNeigh, sizeof (*ipNeigh));
-    ipNeigh->InterfaceLuid.Value = ovsInternalRow.InterfaceLuid.Value;
-    ipNeigh->InterfaceIndex = ovsInternalRow.InterfaceIndex;
+    ipNeigh->InterfaceLuid.Value = ipRow.InterfaceLuid.Value;
+    ipNeigh->InterfaceIndex = ipRow.InterfaceIndex;
     ipNeigh->Address.si_family = AF_INET;
     ipNeigh->Address.Ipv4.sin_addr.s_addr = ipAddr;
 
@@ -438,8 +496,8 @@ OvsGetOrResolveIPNeigh(UINT32 ipAddr,
 
     if (status != STATUS_SUCCESS) {
         RtlZeroMemory(ipNeigh, sizeof (*ipNeigh));
-        ipNeigh->InterfaceLuid.Value = ovsInternalRow.InterfaceLuid.Value;
-        ipNeigh->InterfaceIndex = ovsInternalRow.InterfaceIndex;
+        ipNeigh->InterfaceLuid.Value = ipRow.InterfaceLuid.Value;
+        ipNeigh->InterfaceIndex = ipRow.InterfaceIndex;
         ipNeigh->Address.si_family = AF_INET;
         ipNeigh->Address.Ipv4.sin_addr.s_addr = ipAddr;
         status = OvsResolveIPNeighEntry(ipNeigh);
@@ -447,57 +505,241 @@ OvsGetOrResolveIPNeigh(UINT32 ipAddr,
     return status;
 }
 
+static __inline BOOLEAN
+OvsCheckInstanceRow(PMIB_IF_ROW2 instanceRow,
+                    PNET_LUID netLuid,
+                    NET_IFINDEX ifIndex)
+{
+    return (instanceRow->InterfaceLuid.Info.NetLuidIndex ==
+            netLuid->Info.NetLuidIndex &&
+            instanceRow->InterfaceLuid.Info.IfType ==
+            netLuid->Info.IfType &&
+            instanceRow->InterfaceIndex ==
+            ifIndex);
+}
 
 static VOID
-OvsChangeCallbackIpInterface(PVOID context,
-                             PMIB_IPINTERFACE_ROW ipRow,
-                             MIB_NOTIFICATION_TYPE notificationType)
+OvsUpdateIpInterfaceNotification(PMIB_IPINTERFACE_ROW ipRow)
 {
-    UNREFERENCED_PARAMETER(context);
-    switch (notificationType) {
-    case MibParameterNotification:
-    case MibAddInstance:
-        if (ipRow->InterfaceLuid.Info.NetLuidIndex ==
-            ovsInternalRow.InterfaceLuid.Info.NetLuidIndex &&
-            ipRow->InterfaceLuid.Info.IfType ==
-            ovsInternalRow.InterfaceLuid.Info.IfType &&
-            ipRow->InterfaceIndex == ovsInternalRow.InterfaceIndex) {
+    PLIST_ENTRY head, link, next;
+
+    ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+    head = &(ovsInstanceList);
+    LIST_FORALL_SAFE(head, link, next) {
+        POVS_IPHELPER_INSTANCE instance = NULL;
+
+        instance = CONTAINING_RECORD(link, OVS_IPHELPER_INSTANCE, link);
+
+        ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
+        if (OvsCheckInstanceRow(&instance->internalRow,
+                                &ipRow->InterfaceLuid,
+                                ipRow->InterfaceIndex)
+           ) {
+
             /*
              * Update the IP Interface Row
              */
-            NdisAcquireSpinLock(&ovsIpHelperLock);
-            RtlCopyMemory(&ovsInternalIPRow, ipRow,
-                          sizeof (PMIB_IPINTERFACE_ROW));
-            ovsInternalIPConfigured = TRUE;
-            NdisReleaseSpinLock(&ovsIpHelperLock);
+            RtlCopyMemory(&instance->internalIPRow, ipRow,
+                            sizeof(PMIB_IPINTERFACE_ROW));
+            instance->isIpConfigured = TRUE;
+
+            OVS_LOG_INFO("IP Interface with NetLuidIndex: %d, type: %d is %s",
+                         ipRow->InterfaceLuid.Info.NetLuidIndex,
+                         ipRow->InterfaceLuid.Info.IfType,
+                         "modified");
+
+            ExReleaseResourceLite(&instance->lock);
+            break;
         }
-        OVS_LOG_INFO("IP Interface with NetLuidIndex: %d, type: %d is %s",
-                     ipRow->InterfaceLuid.Info.NetLuidIndex,
-                     ipRow->InterfaceLuid.Info.IfType,
-                     notificationType == MibAddInstance ? "added" : "modified");
-        break;
-    case MibDeleteInstance:
-        OVS_LOG_INFO("IP Interface with NetLuidIndex: %d, type: %d, deleted",
-                     ipRow->InterfaceLuid.Info.NetLuidIndex,
-                     ipRow->InterfaceLuid.Info.IfType);
-        if (ipRow->InterfaceLuid.Info.NetLuidIndex ==
-            ovsInternalRow.InterfaceLuid.Info.NetLuidIndex &&
-            ipRow->InterfaceLuid.Info.IfType ==
-            ovsInternalRow.InterfaceLuid.Info.IfType &&
-            ipRow->InterfaceIndex == ovsInternalRow.InterfaceIndex) {
+        ExReleaseResourceLite(&instance->lock);
+    }
+    ExReleaseResourceLite(&ovsInstanceListLock);
 
-            NdisAcquireSpinLock(&ovsIpHelperLock);
-            ovsInternalIPConfigured = FALSE;
-            NdisReleaseSpinLock(&ovsIpHelperLock);
+    return;
+}
+
+static VOID
+OvsAddIpInterfaceNotification(PMIB_IPINTERFACE_ROW ipRow)
+{
+    PLIST_ENTRY head, link, next;
+    BOOLEAN found = FALSE;
+
+    ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+    head = &(ovsInstanceList);
+    LIST_FORALL_SAFE(head, link, next) {
+        POVS_IPHELPER_INSTANCE instance = NULL;
+
+        instance = CONTAINING_RECORD(link, OVS_IPHELPER_INSTANCE, link);
+
+        ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
+        if (OvsCheckInstanceRow(&instance->internalRow, &ipRow->InterfaceLuid,
+                                ipRow->InterfaceIndex)) {
 
-            OvsCleanupIpHelperRequestList();
+            instance->isIpConfigured = FALSE;
+            ExReleaseResourceLite(&instance->lock);
 
-            OvsCleanupFwdTable();
+            found = TRUE;
+
+            break;
         }
+        ExReleaseResourceLite(&instance->lock);
+    }
+    ExReleaseResourceLite(&ovsInstanceListLock);
+
+    if (found != TRUE) {
+        NTSTATUS status;
+        POVS_IPHELPER_INSTANCE instance = NULL;
+        MIB_UNICASTIPADDRESS_ROW ipEntry;
+        BOOLEAN error = TRUE;
 
+        instance = (POVS_IPHELPER_INSTANCE)OvsAllocateMemoryWithTag(
+            sizeof(*instance), OVS_IPHELPER_POOL_TAG);
+        if (instance == NULL) {
+            goto error;
+        }
+        RtlZeroMemory(instance, sizeof(*instance));
+
+        InitializeListHead(&instance->link);
+        ExInitializeResourceLite(&instance->lock);
+        WCHAR interfaceName[IF_MAX_STRING_SIZE] = { 0 };
+        status = ConvertInterfaceLuidToAlias(&ipRow->InterfaceLuid,
+                                             interfaceName,
+                                             IF_MAX_STRING_SIZE + 1);
+        POVS_VPORT_ENTRY vport = OvsFindVportByHvNameW(gOvsSwitchContext,
+                                                       interfaceName,
+                                                       sizeof(WCHAR) *
+                                                       wcslen(interfaceName));
+
+        if (vport == NULL) {
+            goto error;
+        }
+        RtlCopyMemory(&instance->netCfgId,
+                      &vport->netCfgInstanceId,
+                      sizeof(instance->netCfgId));
+        instance->portNo = vport->portNo;
+        RtlZeroMemory(&instance->internalRow, sizeof(MIB_IF_ROW2));
+        RtlZeroMemory(&instance->internalIPRow, sizeof(MIB_IPINTERFACE_ROW));
+        status = OvsGetIfEntry(&instance->netCfgId,
+                               &instance->internalRow);
+
+        if (status != STATUS_SUCCESS) {
+            OVS_LOG_ERROR("Fail to get IF entry for internal port with GUID"
+                          "  %08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
+                          instance->netCfgId.Data1,
+                          instance->netCfgId.Data2,
+                          instance->netCfgId.Data3,
+                          *(UINT16 *)instance->netCfgId.Data4,
+                          instance->netCfgId.Data4[2],
+                          instance->netCfgId.Data4[3],
+                          instance->netCfgId.Data4[4],
+                          instance->netCfgId.Data4[5],
+                          instance->netCfgId.Data4[6],
+                          instance->netCfgId.Data4[7]);
+            goto error;
+        }
+
+        status = OvsGetIPInterfaceEntry(instance->internalRow.InterfaceLuid,
+                                        &instance->internalIPRow);
+
+        if (status == STATUS_SUCCESS) {
+            instance->isIpConfigured = TRUE;
+        }
+        else {
+            goto error;
+        }
+
+        status = OvsGetIPEntry(instance->internalRow.InterfaceLuid, &ipEntry);
+        if (status != STATUS_SUCCESS) {
+            OVS_LOG_INFO("Fail to get IP entry for internal port with GUID"
+                "  %08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
+                instance->netCfgId.Data1,
+                instance->netCfgId.Data2,
+                instance->netCfgId.Data3,
+                *(UINT16 *)instance->netCfgId.Data4,
+                instance->netCfgId.Data4[2],
+                instance->netCfgId.Data4[3],
+                instance->netCfgId.Data4[4],
+                instance->netCfgId.Data4[5],
+                instance->netCfgId.Data4[6],
+                instance->netCfgId.Data4[7]);
+            goto error;
+        }
+
+        ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+        InsertHeadList(&ovsInstanceList, &instance->link);
+        ExReleaseResourceLite(&ovsInstanceListLock);
+
+        error = FALSE;
+
+error:
+        if (error) {
+            OvsIpHelperDeleteInstance(instance);
+        }
+    }
+
+    return;
+}
+
+static VOID
+OvsRemoveIpInterfaceNotification(PMIB_IPINTERFACE_ROW ipRow)
+{
+    PLIST_ENTRY head, link, next;
+
+    ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+    head = &(ovsInstanceList);
+    LIST_FORALL_SAFE(head, link, next) {
+        POVS_IPHELPER_INSTANCE instance = NULL;
+
+        instance = CONTAINING_RECORD(link, OVS_IPHELPER_INSTANCE, link);
+
+        ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
+        if (OvsCheckInstanceRow(&instance->internalRow, &ipRow->InterfaceLuid,
+            ipRow->InterfaceIndex)) {
+
+            instance->isIpConfigured = FALSE;
+            RemoveEntryList(&instance->link);
+
+            ExReleaseResourceLite(&instance->lock);
+            OvsIpHelperDeleteInstance(instance);
+
+            OVS_LOG_INFO("IP Interface with NetLuidIndex: %d, type: %d is "\
+                         "deleted",
+                         ipRow->InterfaceLuid.Info.NetLuidIndex,
+                         ipRow->InterfaceLuid.Info.IfType);
+
+            break;
+        }
+        ExReleaseResourceLite(&instance->lock);
+    }
+    ExReleaseResourceLite(&ovsInstanceListLock);
+
+    if (IsListEmpty(&ovsInstanceList)) {
+        OvsCleanupIpHelperRequestList();
+        OvsCleanupFwdTable();
+    }
+
+    return;
+}
+
+static VOID
+OvsChangeCallbackIpInterface(PVOID context,
+                             PMIB_IPINTERFACE_ROW ipRow,
+                             MIB_NOTIFICATION_TYPE notificationType)
+{
+    UNREFERENCED_PARAMETER(context);
+    switch (notificationType) {
+    case MibParameterNotification:
+        OvsUpdateIpInterfaceNotification(ipRow);
+        break;
+    case MibAddInstance:
+        OvsAddIpInterfaceNotification(ipRow);
+        break;
+
+    case MibDeleteInstance:
+        OvsRemoveIpInterfaceNotification(ipRow);
         break;
     case MibInitialNotification:
-        OVS_LOG_INFO("Get Initial notification for IP Interface change.");
+        OVS_LOG_INFO("Got Initial notification for IP Interface change.");
     default:
         return;
     }
@@ -529,25 +771,38 @@ OvsChangeCallbackIpRoute(PVOID context,
 
     case MibParameterNotification:
     case MibDeleteInstance:
+    {
+        PLIST_ENTRY head, link, next;
+        BOOLEAN found = FALSE;
+
         ASSERT(ipRoute);
         ipAddr = ipRoute->DestinationPrefix.Prefix.Ipv4.sin_addr.s_addr;
         nextHop = ipRoute->NextHop.Ipv4.sin_addr.s_addr;
 
-        OVS_LOG_INFO("IPRoute: To %d.%d.%d.%d/%d through %d.%d.%d.%d %s.",
-                     ipAddr & 0xff, (ipAddr >> 8) & 0xff,
-                     (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff,
-                     ipRoute->DestinationPrefix.PrefixLength,
-                     nextHop & 0xff, (nextHop >> 8) & 0xff,
-                     (nextHop >> 16) & 0xff, (nextHop >> 24) & 0xff,
-                     notificationType == MibDeleteInstance ? "deleted" :
-                     "modified");
+        ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+        head = &(ovsInstanceList);
+        LIST_FORALL_SAFE(head, link, next) {
+            POVS_IPHELPER_INSTANCE instance = NULL;
+
+            instance = CONTAINING_RECORD(link, OVS_IPHELPER_INSTANCE, link);
 
-        if (ipRoute->InterfaceLuid.Info.NetLuidIndex ==
-            ovsInternalRow.InterfaceLuid.Info.NetLuidIndex &&
-            ipRoute->InterfaceLuid.Info.IfType ==
-            ovsInternalRow.InterfaceLuid.Info.IfType &&
-            ipRoute->InterfaceIndex == ovsInternalRow.InterfaceIndex) {
+            ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
+            if (instance->isIpConfigured &&
+                OvsCheckInstanceRow(&instance->internalRow,
+                                    &ipRoute->InterfaceLuid,
+                                    ipRoute->InterfaceIndex)
+                ) {
 
+                found = TRUE;
+
+                ExReleaseResourceLite(&instance->lock);
+                break;
+            }
+            ExReleaseResourceLite(&instance->lock);
+        }
+        ExReleaseResourceLite(&ovsInstanceListLock);
+
+        if (found) {
             POVS_IPFORWARD_ENTRY ipf;
             LOCK_STATE_EX lockState;
 
@@ -557,8 +812,18 @@ OvsChangeCallbackIpRoute(PVOID context,
                 OvsRemoveIPForwardEntry(ipf);
             }
             NdisReleaseRWLock(ovsTableLock, &lockState);
+
+            OVS_LOG_INFO("IPRoute: To %d.%d.%d.%d/%d through %d.%d.%d.%d %s.",
+                         ipAddr & 0xff, (ipAddr >> 8) & 0xff,
+                         (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff,
+                         ipRoute->DestinationPrefix.PrefixLength,
+                         nextHop & 0xff, (nextHop >> 8) & 0xff,
+                         (nextHop >> 16) & 0xff, (nextHop >> 24) & 0xff,
+                         notificationType == MibDeleteInstance ? "deleted" :
+                         "modified");
         }
         break;
+    }
 
     case MibInitialNotification:
         OVS_LOG_INFO("Get Initial notification for IP Route change.");
@@ -579,40 +844,87 @@ OvsChangeCallbackUnicastIpAddress(PVOID context,
     switch (notificationType) {
     case MibParameterNotification:
     case MibAddInstance:
+    {
+        PLIST_ENTRY head, link, next;
+
         ASSERT(unicastRow);
         ipAddr = unicastRow->Address.Ipv4.sin_addr.s_addr;
-        if (unicastRow->InterfaceLuid.Info.NetLuidIndex ==
-            ovsInternalRow.InterfaceLuid.Info.NetLuidIndex &&
-            unicastRow->InterfaceLuid.Info.IfType ==
-            ovsInternalRow.InterfaceLuid.Info.IfType &&
-            unicastRow->InterfaceIndex == ovsInternalRow.InterfaceIndex) {
-            ovsInternalIP = ipAddr;
+
+        ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+        head = &(ovsInstanceList);
+        LIST_FORALL_SAFE(head, link, next) {
+            POVS_IPHELPER_INSTANCE instance = NULL;
+
+            instance = CONTAINING_RECORD(link, OVS_IPHELPER_INSTANCE, link);
+
+            ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
+            if (instance->isIpConfigured &&
+                OvsCheckInstanceRow(&instance->internalRow,
+                                    &unicastRow->InterfaceLuid,
+                                    unicastRow->InterfaceIndex)
+               ) {
+
+                instance->ipAddress = ipAddr;
+
+                OVS_LOG_INFO("IP Address: %d.%d.%d.%d is %s",
+                             ipAddr & 0xff, (ipAddr >> 8) & 0xff,
+                             (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff,
+                             notificationType == MibAddInstance ? "added": "modified");
+
+                ExReleaseResourceLite(&instance->lock);
+                break;
+            }
+            ExReleaseResourceLite(&instance->lock);
         }
-        OVS_LOG_INFO("IP Address: %d.%d.%d.%d is %s",
-                     ipAddr & 0xff, (ipAddr >> 8) & 0xff,
-                     (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff,
-                     notificationType == MibAddInstance ? "added": "modified");
+        ExReleaseResourceLite(&ovsInstanceListLock);
+
         break;
+    }
 
     case MibDeleteInstance:
+    {
+        PLIST_ENTRY head, link, next;
+        LOCK_STATE_EX lockState;
+        BOOLEAN found = FALSE;
+
         ASSERT(unicastRow);
         ipAddr = unicastRow->Address.Ipv4.sin_addr.s_addr;
-        OVS_LOG_INFO("IP Address removed: %d.%d.%d.%d",
-                     ipAddr & 0xff, (ipAddr >> 8) & 0xff,
-                     (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff);
-        if (unicastRow->InterfaceLuid.Info.NetLuidIndex ==
-            ovsInternalRow.InterfaceLuid.Info.NetLuidIndex &&
-            unicastRow->InterfaceLuid.Info.IfType ==
-            ovsInternalRow.InterfaceLuid.Info.IfType &&
-            unicastRow->InterfaceIndex == ovsInternalRow.InterfaceIndex) {
 
-            LOCK_STATE_EX lockState;
+        ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+        head = &(ovsInstanceList);
+        LIST_FORALL_SAFE(head, link, next) {
+            POVS_IPHELPER_INSTANCE instance = NULL;
+
+            instance = CONTAINING_RECORD(link, OVS_IPHELPER_INSTANCE, link);
+
+            ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
+            if (instance->isIpConfigured &&
+                OvsCheckInstanceRow(&instance->internalRow,
+                                    &unicastRow->InterfaceLuid,
+                                    unicastRow->InterfaceIndex)
+               ) {
+
+                found = TRUE;
+
+                ExReleaseResourceLite(&instance->lock);
+                break;
+            }
+            ExReleaseResourceLite(&instance->lock);
+        }
+        ExReleaseResourceLite(&ovsInstanceListLock);
+
+        if (found) {
             NdisAcquireRWLockWrite(ovsTableLock, &lockState, 0);
             OvsRemoveAllFwdEntriesWithSrc(ipAddr);
             NdisReleaseRWLock(ovsTableLock, &lockState);
 
+            OVS_LOG_INFO("IP Address removed: %d.%d.%d.%d",
+                         ipAddr & 0xff, (ipAddr >> 8) & 0xff,
+                         (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff);
         }
+
         break;
+    }
 
     case MibInitialNotification:
         OVS_LOG_INFO("Get Initial notification for Unicast IP Address change.");
@@ -643,7 +955,7 @@ OvsCancelChangeNotification()
 static NTSTATUS
 OvsRegisterChangeNotification()
 {
-    NTSTATUS status;
+    NTSTATUS status = NDIS_STATUS_SUCCESS;
 
 
     status = NotifyIpInterfaceChange(AF_INET, OvsChangeCallbackIpInterface,
@@ -651,7 +963,7 @@ OvsRegisterChangeNotification()
                                      &ipInterfaceNotificationHandle);
     if (status != STATUS_SUCCESS) {
         OVS_LOG_ERROR("Fail to register Notify IP interface change, status:%x.",
-                     status);
+                      status);
         return status;
     }
 
@@ -659,7 +971,7 @@ OvsRegisterChangeNotification()
                                 TRUE, &ipRouteNotificationHandle);
     if (status != STATUS_SUCCESS) {
         OVS_LOG_ERROR("Fail to regiter ip route change, status: %x.",
-                     status);
+                      status);
         goto register_cleanup;
     }
     status = NotifyUnicastIpAddressChange(AF_INET,
@@ -682,10 +994,11 @@ static POVS_IPNEIGH_ENTRY
 OvsLookupIPNeighEntry(UINT32 ipAddr)
 {
     PLIST_ENTRY link;
-    POVS_IPNEIGH_ENTRY entry;
     UINT32 hash = OvsJhashWords(&ipAddr, 1, OVS_HASH_BASIS);
 
     LIST_FORALL(&ovsNeighHashTable[hash & OVS_NEIGH_HASH_TABLE_MASK], link) {
+        POVS_IPNEIGH_ENTRY entry;
+
         entry = CONTAINING_RECORD(link, OVS_IPNEIGH_ENTRY, link);
         if (entry->ipAddr == ipAddr) {
             return entry;
@@ -709,7 +1022,6 @@ OvsLookupIPForwardEntry(PIP_ADDRESS_PREFIX prefix)
 {
 
     PLIST_ENTRY link;
-    POVS_IPFORWARD_ENTRY ipfEntry;
     UINT32 hash;
     ASSERT(prefix->Prefix.si_family == AF_INET);
 
@@ -720,6 +1032,8 @@ OvsLookupIPForwardEntry(PIP_ADDRESS_PREFIX prefix)
 
     hash = OvsHashIPPrefix(prefix);
     LIST_FORALL(&ovsRouteHashTable[hash & OVS_ROUTE_HASH_TABLE_MASK], link) {
+        POVS_IPFORWARD_ENTRY ipfEntry;
+
         ipfEntry = CONTAINING_RECORD(link, OVS_IPFORWARD_ENTRY, link);
         if (ipfEntry->prefix.PrefixLength == prefix->PrefixLength &&
             ipfEntry->prefix.Prefix.Ipv4.sin_addr.s_addr ==
@@ -735,10 +1049,11 @@ static POVS_FWD_ENTRY
 OvsLookupIPFwdEntry(UINT32 dstIp)
 {
     PLIST_ENTRY link;
-    POVS_FWD_ENTRY entry;
     UINT32 hash = OvsJhashWords(&dstIp, 1, OVS_HASH_BASIS);
 
     LIST_FORALL(&ovsFwdHashTable[hash & OVS_FWD_HASH_TABLE_MASK], link) {
+        POVS_FWD_ENTRY entry;
+
         entry = CONTAINING_RECORD(link, OVS_FWD_ENTRY, link);
         if (entry->info.dstIpAddr == dstIp) {
             return entry;
@@ -759,9 +1074,8 @@ OvsLookupIPFwdInfo(UINT32 dstIp,
     NdisAcquireRWLockRead(ovsTableLock, &lockState, 0);
     entry = OvsLookupIPFwdEntry(dstIp);
     if (entry) {
-        info->value[0] = entry->info.value[0];
-        info->value[1] = entry->info.value[1];
-        info->value[2] = entry->info.value[2];
+        RtlCopyMemory(info->value, entry->info.value,
+                      sizeof entry->info.value);
         status = STATUS_SUCCESS;
     }
     NdisReleaseRWLock(ovsTableLock, &lockState);
@@ -770,7 +1084,8 @@ OvsLookupIPFwdInfo(UINT32 dstIp,
 
 
 static POVS_IPNEIGH_ENTRY
-OvsCreateIPNeighEntry(PMIB_IPNET_ROW2 ipNeigh)
+OvsCreateIPNeighEntry(PMIB_IPNET_ROW2 ipNeigh,
+                      POVS_IPHELPER_INSTANCE instance)
 {
 
     POVS_IPNEIGH_ENTRY entry;
@@ -790,6 +1105,7 @@ OvsCreateIPNeighEntry(PMIB_IPNET_ROW2 ipNeigh)
     RtlCopyMemory(entry->macAddr, ipNeigh->PhysicalAddress,
                   ETH_ADDR_LEN);
     InitializeListHead(&entry->fwdList);
+    entry->context = (PVOID)instance;
 
     return entry;
 }
@@ -798,7 +1114,6 @@ OvsCreateIPNeighEntry(PMIB_IPNET_ROW2 ipNeigh)
 static POVS_IPFORWARD_ENTRY
 OvsCreateIPForwardEntry(PMIB_IPFORWARD_ROW2 ipRoute)
 {
-
     POVS_IPFORWARD_ENTRY entry;
 
     ASSERT(ipRoute);
@@ -876,12 +1191,13 @@ OvsRemoveFwdEntry(POVS_FWD_ENTRY fwdEntry)
 static VOID
 OvsRemoveIPForwardEntry(POVS_IPFORWARD_ENTRY ipf)
 {
-    POVS_FWD_ENTRY fwdEntry;
     PLIST_ENTRY link, next;
 
     ipf->refCount++;
 
     LIST_FORALL_SAFE(&ipf->fwdList, link, next) {
+        POVS_FWD_ENTRY fwdEntry;
+
         fwdEntry = CONTAINING_RECORD(link, OVS_FWD_ENTRY, ipfLink);
         OvsRemoveFwdEntry(fwdEntry);
     }
@@ -896,11 +1212,12 @@ static VOID
 OvsRemoveIPNeighEntry(POVS_IPNEIGH_ENTRY ipn)
 {
     PLIST_ENTRY link, next;
-    POVS_FWD_ENTRY fwdEntry;
 
     ipn->refCount++;
 
     LIST_FORALL_SAFE(&ipn->fwdList, link, next) {
+        POVS_FWD_ENTRY fwdEntry;
+
         fwdEntry = CONTAINING_RECORD(link, OVS_FWD_ENTRY, ipnLink);
         OvsRemoveFwdEntry(fwdEntry);
     }
@@ -973,11 +1290,12 @@ static VOID
 OvsRemoveAllFwdEntriesWithSrc(UINT32 ipAddr)
 {
     UINT32 i;
-    POVS_FWD_ENTRY fwdEntry;
     PLIST_ENTRY link, next;
 
     for (i = 0; i < OVS_FWD_HASH_TABLE_SIZE; i++) {
         LIST_FORALL_SAFE(&ovsFwdHashTable[i], link, next) {
+            POVS_FWD_ENTRY fwdEntry;
+
             fwdEntry = CONTAINING_RECORD(link, OVS_FWD_ENTRY, link);
             if (fwdEntry->info.srcIpAddr == ipAddr) {
                 OvsRemoveFwdEntry(fwdEntry);
@@ -991,13 +1309,14 @@ static VOID
 OvsCleanupFwdTable(VOID)
 {
     PLIST_ENTRY link, next;
-    POVS_IPNEIGH_ENTRY ipn;
     UINT32 i;
     LOCK_STATE_EX lockState;
 
     NdisAcquireRWLockWrite(ovsTableLock, &lockState, 0);
     if (ovsNumFwdEntries) {
        LIST_FORALL_SAFE(&ovsSortedIPNeighList, link, next) {
+           POVS_IPNEIGH_ENTRY ipn;
+
            ipn = CONTAINING_RECORD(link, OVS_IPNEIGH_ENTRY, slink);
            OvsRemoveIPNeighEntry(ipn);
        }
@@ -1017,20 +1336,16 @@ OvsCleanupIpHelperRequestList(VOID)
 {
     LIST_ENTRY list;
     PLIST_ENTRY next, link;
-    POVS_IP_HELPER_REQUEST request;
 
     NdisAcquireSpinLock(&ovsIpHelperLock);
-    if (ovsNumIpHelperRequests == 0) {
-       NdisReleaseSpinLock(&ovsIpHelperLock);
-       return;
-    }
-
     InitializeListHead(&list);
-    OvsAppendList(&list,  &ovsIpHelperRequestList);
+    OvsAppendList(&list, &ovsIpHelperRequestList);
     ovsNumIpHelperRequests = 0;
     NdisReleaseSpinLock(&ovsIpHelperLock);
 
     LIST_FORALL_SAFE(&list, link, next) {
+        POVS_IP_HELPER_REQUEST request;
+
         request = CONTAINING_RECORD(link, OVS_IP_HELPER_REQUEST, link);
 
         if (request->command == OVS_IP_HELPER_FWD_REQUEST &&
@@ -1056,27 +1371,47 @@ OvsWakeupIPHelper(VOID)
 }
 
 VOID
-OvsInternalAdapterDown(VOID)
+OvsInternalAdapterDown(UINT32 portNo,
+                       GUID netCfgInstanceId)
 {
-    NdisAcquireSpinLock(&ovsIpHelperLock);
-    ovsInternalAdapterUp = FALSE;
-    ovsInternalIPConfigured = FALSE;
-    NdisReleaseSpinLock(&ovsIpHelperLock);
+    PLIST_ENTRY head, link, next;
 
-    OvsCleanupIpHelperRequestList();
+    ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+    head = &ovsInstanceList;
+    LIST_FORALL_SAFE(head, link, next) {
+        POVS_IPHELPER_INSTANCE instance = NULL;
 
-    OvsCleanupFwdTable();
+        instance = CONTAINING_RECORD(link, OVS_IPHELPER_INSTANCE, link);
+
+        ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
+        if (instance->portNo == portNo &&
+            IsEqualGUID(&instance->netCfgId, &netCfgInstanceId)) {
+
+            RemoveEntryList(&instance->link);
+
+            ExReleaseResourceLite(&instance->lock);
+
+            OvsIpHelperDeleteInstance(instance);
+            break;
+        }
+        ExReleaseResourceLite(&instance->lock);
+    }
+    ExReleaseResourceLite(&ovsInstanceListLock);
+
+    if (IsListEmpty(&ovsInstanceList)) {
+        OvsCleanupIpHelperRequestList();
+
+        OvsCleanupFwdTable();
+    }
 }
 
 
 VOID
-OvsInternalAdapterUp(GUID *netCfgInstanceId)
+OvsInternalAdapterUp(UINT32 portNo,
+                     GUID *netCfgInstanceId)
 {
     POVS_IP_HELPER_REQUEST request;
 
-    RtlCopyMemory(&ovsInternalNetCfgId, netCfgInstanceId, sizeof (GUID));
-    RtlZeroMemory(&ovsInternalRow, sizeof (MIB_IF_ROW2));
-
     request = (POVS_IP_HELPER_REQUEST)OvsAllocateMemoryWithTag(
         sizeof(OVS_IP_HELPER_REQUEST), OVS_IPHELPER_POOL_TAG);
     if (request == NULL) {
@@ -1084,10 +1419,13 @@ OvsInternalAdapterUp(GUID *netCfgInstanceId)
         return;
     }
     RtlZeroMemory(request, sizeof (OVS_IP_HELPER_REQUEST));
+    RtlCopyMemory(&request->instanceReq.netCfgInstanceId,
+                  netCfgInstanceId,
+                  sizeof(*netCfgInstanceId));
     request->command = OVS_IP_HELPER_INTERNAL_ADAPTER_UP;
+    request->instanceReq.portNo = portNo;
 
     NdisAcquireSpinLock(&ovsIpHelperLock);
-    ovsInternalAdapterUp = TRUE;
     InsertHeadList(&ovsIpHelperRequestList, &request->link);
     ovsNumIpHelperRequests++;
     if (ovsNumIpHelperRequests == 1) {
@@ -1097,58 +1435,135 @@ OvsInternalAdapterUp(GUID *netCfgInstanceId)
 }
 
 
+static POVS_IPHELPER_INSTANCE
+OvsIpHelperAllocateInstance(POVS_IP_HELPER_REQUEST request)
+{
+    POVS_IPHELPER_INSTANCE instance = NULL;
+
+    instance = (POVS_IPHELPER_INSTANCE)OvsAllocateMemoryWithTag(
+        sizeof(*instance), OVS_IPHELPER_POOL_TAG);
+    if (instance) {
+        RtlZeroMemory(instance, sizeof(*instance));
+
+        RtlCopyMemory(&instance->netCfgId,
+                      &request->instanceReq.netCfgInstanceId,
+                      sizeof(instance->netCfgId));
+        instance->portNo = request->instanceReq.portNo;
+
+        InitializeListHead(&instance->link);
+        ExInitializeResourceLite(&instance->lock);
+    }
+
+    return instance;
+}
+
+
+static VOID
+OvsIpHelperDeleteInstance(POVS_IPHELPER_INSTANCE instance)
+{
+    if (instance) {
+        ExDeleteResourceLite(&instance->lock);
+        OvsFreeMemoryWithTag(instance, OVS_IPHELPER_POOL_TAG);
+    }
+}
+
+
+static VOID
+OvsIpHelperDeleteAllInstances()
+{
+    PLIST_ENTRY head, link, next;
+
+    ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+    head = &ovsInstanceList;
+    if (!IsListEmpty(head)) {
+        LIST_FORALL_SAFE(head, link, next) {
+            POVS_IPHELPER_INSTANCE instance = NULL;
+            instance = CONTAINING_RECORD(link, OVS_IPHELPER_INSTANCE, link);
+
+            ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
+
+            instance->isIpConfigured = FALSE;
+            RemoveEntryList(&instance->link);
+
+            ExReleaseResourceLite(&instance->lock);
+
+            OvsIpHelperDeleteInstance(instance);
+        }
+    }
+    ExReleaseResourceLite(&ovsInstanceListLock);
+}
+
+
 static VOID
 OvsHandleInternalAdapterUp(POVS_IP_HELPER_REQUEST request)
 {
     NTSTATUS status;
+    POVS_IPHELPER_INSTANCE instance = NULL;
     MIB_UNICASTIPADDRESS_ROW ipEntry;
-    GUID *netCfgInstanceId = &ovsInternalNetCfgId;
+    BOOLEAN error = TRUE;
 
-    OvsFreeMemoryWithTag(request, OVS_IPHELPER_POOL_TAG);
+    do {
+        instance = OvsIpHelperAllocateInstance(request);
+        if (instance == NULL) {
+            break;
+        }
+        RtlZeroMemory(&instance->internalRow, sizeof(MIB_IF_ROW2));
+        RtlZeroMemory(&instance->internalIPRow, sizeof(MIB_IPINTERFACE_ROW));
+        status = OvsGetIfEntry(&instance->netCfgId,
+                               &instance->internalRow);
 
-    status = OvsGetIfEntry(&ovsInternalNetCfgId, &ovsInternalRow);
+        if (status != STATUS_SUCCESS) {
+            OVS_LOG_ERROR("Fail to get IF entry for internal port with GUID"
+                          "  %08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
+                          instance->netCfgId.Data1,
+                          instance->netCfgId.Data2,
+                          instance->netCfgId.Data3,
+                          *(UINT16 *)instance->netCfgId.Data4,
+                          instance->netCfgId.Data4[2],
+                          instance->netCfgId.Data4[3],
+                          instance->netCfgId.Data4[4],
+                          instance->netCfgId.Data4[5],
+                          instance->netCfgId.Data4[6],
+                          instance->netCfgId.Data4[7]);
+            break;
+        }
 
-    if (status != STATUS_SUCCESS) {
-        OVS_LOG_ERROR("Fali to get IF entry for internal port with GUID"
-                      "  %08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
-                      netCfgInstanceId->Data1,
-                      netCfgInstanceId->Data2,
-                      netCfgInstanceId->Data3,
-                      *(UINT16 *)netCfgInstanceId->Data4,
-                      netCfgInstanceId->Data4[2],
-                      netCfgInstanceId->Data4[3],
-                      netCfgInstanceId->Data4[4],
-                      netCfgInstanceId->Data4[5],
-                      netCfgInstanceId->Data4[6],
-                      netCfgInstanceId->Data4[7]);
-        return;
-    }
+        status = OvsGetIPInterfaceEntry(instance->internalRow.InterfaceLuid,
+                                        &instance->internalIPRow);
 
-    status = OvsGetIPInterfaceEntry(ovsInternalRow.InterfaceLuid,
-                                    &ovsInternalIPRow);
+        if (status == STATUS_SUCCESS) {
+            instance->isIpConfigured = TRUE;
+        } else {
+            break;
+        }
 
-    if (status == STATUS_SUCCESS) {
-        NdisAcquireSpinLock(&ovsIpHelperLock);
-        ovsInternalIPConfigured = TRUE;
-        NdisReleaseSpinLock(&ovsIpHelperLock);
-    } else {
-        return;
-    }
+        status = OvsGetIPEntry(instance->internalRow.InterfaceLuid, &ipEntry);
+        if (status != STATUS_SUCCESS) {
+            OVS_LOG_INFO("Fail to get IP entry for internal port with GUID"
+                         "  %08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
+                         instance->netCfgId.Data1,
+                         instance->netCfgId.Data2,
+                         instance->netCfgId.Data3,
+                         *(UINT16 *)instance->netCfgId.Data4,
+                         instance->netCfgId.Data4[2],
+                         instance->netCfgId.Data4[3],
+                         instance->netCfgId.Data4[4],
+                         instance->netCfgId.Data4[5],
+                         instance->netCfgId.Data4[6],
+                         instance->netCfgId.Data4[7]);
+            break;
+        }
 
-    status = OvsGetIPEntry(ovsInternalRow.InterfaceLuid, &ipEntry);
-    if (status != STATUS_SUCCESS) {
-        OVS_LOG_INFO("Fali to get IP entry for internal port with GUID"
-                     "  %08x-%04x-%04x-%04x-%02x%02x%02x%02x%02x%02x",
-                     netCfgInstanceId->Data1,
-                     netCfgInstanceId->Data2,
-                     netCfgInstanceId->Data3,
-                     *(UINT16 *)netCfgInstanceId->Data4,
-                     netCfgInstanceId->Data4[2],
-                     netCfgInstanceId->Data4[3],
-                     netCfgInstanceId->Data4[4],
-                     netCfgInstanceId->Data4[5],
-                     netCfgInstanceId->Data4[6],
-                     netCfgInstanceId->Data4[7]);
+        ExAcquireResourceExclusiveLite(&ovsInstanceListLock, TRUE);
+        InsertHeadList(&ovsInstanceList, &instance->link);
+        ExReleaseResourceLite(&ovsInstanceListLock);
+
+        error = FALSE;
+    } while (error);
+
+    OvsFreeMemoryWithTag(request, OVS_IPHELPER_POOL_TAG);
+    if (error) {
+        OvsIpHelperDeleteInstance(instance);
     }
 }
 
@@ -1156,15 +1571,11 @@ OvsHandleInternalAdapterUp(POVS_IP_HELPER_REQUEST request)
 static NTSTATUS
 OvsEnqueueIpHelperRequest(POVS_IP_HELPER_REQUEST request)
 {
-
-    NdisAcquireSpinLock(&ovsIpHelperLock);
-
-    if (ovsInternalAdapterUp == FALSE ||
-        ovsInternalIPConfigured == FALSE) {
-        NdisReleaseSpinLock(&ovsIpHelperLock);
+    if (IsListEmpty(&ovsInstanceList)) {
         OvsFreeMemoryWithTag(request, OVS_IPHELPER_POOL_TAG);
         return STATUS_NDIS_ADAPTER_NOT_READY;
     } else {
+        NdisAcquireSpinLock(&ovsIpHelperLock);
         InsertHeadList(&ovsIpHelperRequestList, &request->link);
         ovsNumIpHelperRequests++;
         if (ovsNumIpHelperRequests == 1) {
@@ -1222,6 +1633,7 @@ OvsHandleFwdRequest(POVS_IP_HELPER_REQUEST request)
     BOOLEAN  newIPF = FALSE;
     BOOLEAN  newIPN = FALSE;
     BOOLEAN  newFWD = FALSE;
+    POVS_IPHELPER_INSTANCE instance = NULL;
 
     status = OvsLookupIPFwdInfo(request->fwdReq.tunnelKey.dst,
                                 &fwdInfo);
@@ -1236,10 +1648,16 @@ OvsHandleFwdRequest(POVS_IP_HELPER_REQUEST request)
     dst.si_family = AF_INET;
     dst.Ipv4.sin_addr.s_addr = request->fwdReq.tunnelKey.dst;
 
-    status = OvsGetRoute(ovsInternalRow.InterfaceLuid, &dst, &ipRoute, &src);
+    status = OvsGetRoute(&dst, &ipRoute, &src, &instance, &fwdInfo.vport);
     if (status != STATUS_SUCCESS) {
+        UINT32 ipAddr = dst.Ipv4.sin_addr.s_addr;
+        OVS_LOG_INFO("Fail to get route to %d.%d.%d.%d, status: %x",
+                     ipAddr & 0xff, (ipAddr >> 8) & 0xff,
+                     (ipAddr >> 16) & 0xff, (ipAddr >> 24) & 0xff, status);
         goto fwd_handle_nbl;
     }
+
+    ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
     srcAddr = src.Ipv4.sin_addr.s_addr;
 
     /* find IPNeigh */
@@ -1252,13 +1670,16 @@ OvsHandleFwdRequest(POVS_IP_HELPER_REQUEST request)
         }
         NdisReleaseRWLock(ovsTableLock, &lockState);
     }
+
     RtlZeroMemory(&ipNeigh, sizeof (ipNeigh));
-    ipNeigh.InterfaceLuid.Value = ovsInternalRow.InterfaceLuid.Value;
+    ipNeigh.InterfaceLuid.Value = instance->internalRow.InterfaceLuid.Value;
     if (ipAddr == 0) {
         ipAddr = request->fwdReq.tunnelKey.dst;
     }
-    status = OvsGetOrResolveIPNeigh(ipAddr, &ipNeigh);
+    status = OvsGetOrResolveIPNeigh(instance->internalRow,
+                                    ipAddr, &ipNeigh);
     if (status != STATUS_SUCCESS) {
+        ExReleaseResourceLite(&instance->lock);
         goto fwd_handle_nbl;
     }
 
@@ -1274,6 +1695,7 @@ fwd_request_done:
         ipf = OvsCreateIPForwardEntry(&ipRoute);
         if (ipf == NULL) {
             NdisReleaseRWLock(ovsTableLock, &lockState);
+            ExReleaseResourceLite(&instance->lock);
             status = STATUS_INSUFFICIENT_RESOURCES;
             goto fwd_handle_nbl;
         }
@@ -1291,9 +1713,10 @@ fwd_request_done:
     if (ipn == NULL) {
         ipn = OvsLookupIPNeighEntry(ipAddr);
         if (ipn == NULL) {
-            ipn = OvsCreateIPNeighEntry(&ipNeigh);
+            ipn = OvsCreateIPNeighEntry(&ipNeigh, instance);
             if (ipn == NULL) {
                 NdisReleaseRWLock(ovsTableLock, &lockState);
+                ExReleaseResourceLite(&instance->lock);
                 status = STATUS_INSUFFICIENT_RESOURCES;
                 goto fwd_handle_nbl;
             }
@@ -1307,13 +1730,14 @@ fwd_request_done:
     fwdInfo.dstIpAddr = request->fwdReq.tunnelKey.dst;
     fwdInfo.srcIpAddr = srcAddr;
     RtlCopyMemory(fwdInfo.dstMacAddr, ipn->macAddr, ETH_ADDR_LEN);
-    RtlCopyMemory(fwdInfo.srcMacAddr, ovsInternalRow.PhysicalAddress,
+    RtlCopyMemory(fwdInfo.srcMacAddr, instance->internalRow.PhysicalAddress,
                   ETH_ADDR_LEN);
     fwdInfo.srcPortNo = request->fwdReq.inPort;
 
     fwdEntry = OvsCreateFwdEntry(&fwdInfo);
     if (fwdEntry == NULL) {
         NdisReleaseRWLock(ovsTableLock, &lockState);
+        ExReleaseResourceLite(&instance->lock);
         status = STATUS_INSUFFICIENT_RESOURCES;
         goto fwd_handle_nbl;
     }
@@ -1323,6 +1747,7 @@ fwd_request_done:
      */
     OvsAddIPFwdCache(fwdEntry, ipf, ipn);
     NdisReleaseRWLock(ovsTableLock, &lockState);
+    ExReleaseResourceLite(&instance->lock);
 
 fwd_handle_nbl:
 
@@ -1425,12 +1850,17 @@ OvsUpdateIPNeighEntry(UINT32 ipAddr,
 
 
 static VOID
-OvsHandleIPNeighTimeout(UINT32 ipAddr)
+OvsHandleIPNeighTimeout(UINT32 ipAddr,
+                        PVOID context)
 {
     MIB_IPNET_ROW2 ipNeigh;
     NTSTATUS status;
+    POVS_IPHELPER_INSTANCE instance = (POVS_IPHELPER_INSTANCE)context;
 
-    status = OvsGetOrResolveIPNeigh(ipAddr, &ipNeigh);
+    ExAcquireResourceExclusiveLite(&instance->lock, TRUE);
+    status = OvsGetOrResolveIPNeigh(instance->internalRow,
+                                    ipAddr, &ipNeigh);
+    ExReleaseResourceLite(&instance->lock);
 
     OvsUpdateIPNeighEntry(ipAddr, &ipNeigh, status);
 }
@@ -1438,13 +1868,13 @@ OvsHandleIPNeighTimeout(UINT32 ipAddr)
 
 /*
  *----------------------------------------------------------------------------
- *  IP Helper system threash handle following request
+ *  IP Helper system thread handles the following requests:
  *    1. Intialize Internal port row when internal port is connected
  *    2. Handle FWD request
  *    3. Handle IP Neigh timeout
  *
  *    IP Interface, unicast address, and IP route change will be handled
- *    by the revelant callback.
+ *    by the revelant callbacks.
  *----------------------------------------------------------------------------
  */
 VOID
@@ -1454,15 +1884,15 @@ OvsStartIpHelper(PVOID data)
     POVS_IP_HELPER_REQUEST req;
     POVS_IPNEIGH_ENTRY ipn;
     PLIST_ENTRY link;
-    UINT64   timeVal, timeout;
+    UINT64 timeVal, timeout;
 
     OVS_LOG_INFO("Start the IP Helper Thread, context: %p", context);
 
     NdisAcquireSpinLock(&ovsIpHelperLock);
     while (!context->exit) {
-
         timeout = 0;
         while (!IsListEmpty(&ovsIpHelperRequestList)) {
+            ovsNumIpHelperRequests--;
             if (context->exit) {
                 goto ip_helper_wait;
             }
@@ -1503,7 +1933,7 @@ OvsStartIpHelper(PVOID data)
 
             NdisReleaseSpinLock(&ovsIpHelperLock);
 
-            OvsHandleIPNeighTimeout(ipAddr);
+            OvsHandleIPNeighTimeout(ipAddr, ipn->context);
 
             NdisAcquireSpinLock(&ovsIpHelperLock);
         }
@@ -1526,7 +1956,6 @@ ip_helper_wait:
     NdisReleaseSpinLock(&ovsIpHelperLock);
     OvsCleanupFwdTable();
     OvsCleanupIpHelperRequestList();
-
     OVS_LOG_INFO("Terminating the OVS IP Helper system thread");
 
     PsTerminateSystemThread(STATUS_SUCCESS);
@@ -1536,7 +1965,8 @@ ip_helper_wait:
 NTSTATUS
 OvsInitIpHelper(NDIS_HANDLE ndisFilterHandle)
 {
-    NTSTATUS status;
+    UNREFERENCED_PARAMETER(ndisFilterHandle);
+    NTSTATUS status = NDIS_STATUS_SUCCESS;
     HANDLE threadHandle;
     UINT32 i;
 
@@ -1549,12 +1979,6 @@ OvsInitIpHelper(NDIS_HANDLE ndisFilterHandle)
     ovsNeighHashTable = (PLIST_ENTRY)OvsAllocateMemoryWithTag(
         sizeof(LIST_ENTRY) * OVS_NEIGH_HASH_TABLE_SIZE, OVS_IPHELPER_POOL_TAG);
 
-    RtlZeroMemory(&ovsInternalRow, sizeof(MIB_IF_ROW2));
-    RtlZeroMemory(&ovsInternalIPRow, sizeof (MIB_IPINTERFACE_ROW));
-    ovsInternalIP = 0;
-
-    ovsInternalAdapterUp = FALSE;
-
     InitializeListHead(&ovsSortedIPNeighList);
 
     ovsTableLock = NdisAllocateRWLock(ndisFilterHandle);
@@ -1566,6 +1990,9 @@ OvsInitIpHelper(NDIS_HANDLE ndisFilterHandle)
     ipRouteNotificationHandle = NULL;
     unicastIPNotificationHandle = NULL;
 
+    ExInitializeResourceLite(&ovsInstanceListLock);
+    InitializeListHead(&ovsInstanceList);
+
     if (ovsFwdHashTable == NULL ||
         ovsRouteHashTable == NULL ||
         ovsNeighHashTable == NULL ||
@@ -1625,6 +2052,7 @@ init_cleanup:
             NdisFreeRWLock(ovsTableLock);
             ovsTableLock = NULL;
         }
+        ExDeleteResourceLite(&ovsInstanceListLock);
         NdisFreeSpinLock(&ovsIpHelperLock);
     }
     return STATUS_SUCCESS;
@@ -1651,6 +2079,9 @@ OvsCleanupIpHelper(VOID)
 
     NdisFreeRWLock(ovsTableLock);
     NdisFreeSpinLock(&ovsIpHelperLock);
+
+    OvsIpHelperDeleteAllInstances();
+    ExDeleteResourceLite(&ovsInstanceListLock);
 }
 
 VOID
diff --git a/datapath-windows/ovsext/IpHelper.h b/datapath-windows/ovsext/IpHelper.h
index 8562f86..095bd05 100644
--- a/datapath-windows/ovsext/IpHelper.h
+++ b/datapath-windows/ovsext/IpHelper.h
@@ -19,6 +19,7 @@
 
 #include <ntddk.h>
 #include <netioapi.h>
+#include <Vport.h>
 
 #define OVS_FWD_HASH_TABLE_SIZE ((UINT32)1 << 10)
 #define OVS_FWD_HASH_TABLE_MASK (OVS_FWD_HASH_TABLE_SIZE - 1)
@@ -41,6 +42,7 @@ typedef struct _OVS_IPNEIGH_ENTRY {
     LIST_ENTRY        link;
     LIST_ENTRY        slink;
     LIST_ENTRY        fwdList;
+    PVOID             context;
 } OVS_IPNEIGH_ENTRY, *POVS_IPNEIGH_ENTRY;
 
 typedef struct _OVS_IPFORWARD_ENTRY {
@@ -58,8 +60,9 @@ typedef union  _OVS_FWD_INFO {
         UINT8         dstMacAddr[ETH_ADDR_LEN];
         UINT8         srcMacAddr[ETH_ADDR_LEN];
         UINT32        srcPortNo;
+        POVS_VPORT_ENTRY   vport;
     };
-    UINT64            value[3];
+    UINT64            value[4];
 } OVS_FWD_INFO, *POVS_FWD_INFO;
 
 typedef struct _OVS_FWD_ENTRY {
@@ -94,13 +97,17 @@ typedef struct _OVS_FWD_REQUEST_INFO {
     PVOID             cbData2;
 } OVS_FWD_REQUEST_INFO, *POVS_FWD_REQUEST_INFO;
 
+typedef struct _OVS_INSTANCE_REQUEST_INFO {
+    GUID              netCfgInstanceId;
+    UINT32            portNo;
+} OVS_INSTANCE_REQUEST_INFO, *POVS_INSTANCE_REQUEST_INFO;
 
 typedef struct _OVS_IP_HELPER_REQUEST {
     LIST_ENTRY        link;
     UINT32            command;
     union {
-        OVS_FWD_REQUEST_INFO    fwdReq;
-        UINT32                  dummy;
+        OVS_FWD_REQUEST_INFO        fwdReq;
+        OVS_INSTANCE_REQUEST_INFO   instanceReq;
     };
 } OVS_IP_HELPER_REQUEST, *POVS_IP_HELPER_REQUEST;
 
@@ -114,8 +121,8 @@ typedef struct _OVS_IP_HELPER_THREAD_CONTEXT {
 NTSTATUS OvsInitIpHelper(NDIS_HANDLE ndisFilterHandle);
 VOID OvsCleanupIpHelper(VOID);
 
-VOID OvsInternalAdapterUp(GUID *netCfgInstanceId);
-VOID OvsInternalAdapterDown(VOID);
+VOID OvsInternalAdapterUp(UINT32 portNo, GUID *netCfgInstanceId);
+VOID OvsInternalAdapterDown(UINT32 portNo, GUID netCfgInstanceId);
 
 NTSTATUS OvsFwdIPHelperRequest(PNET_BUFFER_LIST nbl, UINT32 inPort,
                                const PVOID tunnelKey,
diff --git a/datapath-windows/ovsext/PacketIO.h b/datapath-windows/ovsext/PacketIO.h
index 7247869..b204167 100644
--- a/datapath-windows/ovsext/PacketIO.h
+++ b/datapath-windows/ovsext/PacketIO.h
@@ -56,6 +56,7 @@ NDIS_STATUS OvsActionsExecute(POVS_SWITCH_CONTEXT switchContext,
                               const PNL_ATTR actions, int actionsLen);
 
 VOID OvsLookupFlowOutput(POVS_SWITCH_CONTEXT switchContext,
-                         VOID *compList, PNET_BUFFER_LIST curNbl);
+                         VOID *compList, PNET_BUFFER_LIST curNbl,
+                         POVS_VPORT_ENTRY internalVport);
 
 #endif /* __PACKETIO_H_ */
diff --git a/datapath-windows/ovsext/Stt.c b/datapath-windows/ovsext/Stt.c
index dd7bf92..47d9a8d 100644
--- a/datapath-windows/ovsext/Stt.c
+++ b/datapath-windows/ovsext/Stt.c
@@ -105,7 +105,8 @@ OvsEncapStt(POVS_VPORT_ENTRY vport,
             OvsIPv4TunnelKey *tunKey,
             POVS_SWITCH_CONTEXT switchContext,
             POVS_PACKET_HDR_INFO layers,
-            PNET_BUFFER_LIST *newNbl)
+            PNET_BUFFER_LIST *newNbl,
+            POVS_FWD_INFO switchFwdInfo)
 {
     OVS_FWD_INFO fwdInfo;
     NDIS_STATUS status;
@@ -121,6 +122,8 @@ OvsEncapStt(POVS_VPORT_ENTRY vport,
         return NDIS_STATUS_FAILURE;
     }
 
+    RtlCopyMemory(switchFwdInfo->value, fwdInfo.value, sizeof fwdInfo.value);
+
     status = OvsDoEncapStt(vport, curNbl, tunKey, &fwdInfo, layers,
                            switchContext, newNbl);
     return status;
diff --git a/datapath-windows/ovsext/Stt.h b/datapath-windows/ovsext/Stt.h
index a3e3915..f64654c 100644
--- a/datapath-windows/ovsext/Stt.h
+++ b/datapath-windows/ovsext/Stt.h
@@ -40,6 +40,9 @@
 #define STT_CLEANUP_INTERVAL 300000000 // 30s
 
 #define STT_ETH_PAD 2
+
+typedef union _OVS_FWD_INFO *POVS_FWD_INFO;
+
 typedef struct SttHdr {
     UINT8    version;
     UINT8    flags;
@@ -89,7 +92,8 @@ NDIS_STATUS OvsEncapStt(POVS_VPORT_ENTRY vport,
                         OvsIPv4TunnelKey *tunKey,
                         POVS_SWITCH_CONTEXT switchContext,
                         POVS_PACKET_HDR_INFO layers,
-                        PNET_BUFFER_LIST *newNbl);
+                        PNET_BUFFER_LIST *newNbl,
+                        POVS_FWD_INFO switchFwdInfo);
 
 
 NDIS_STATUS OvsDecapStt(POVS_SWITCH_CONTEXT switchContext,
diff --git a/datapath-windows/ovsext/Switch.h b/datapath-windows/ovsext/Switch.h
index 001335a..7b8712d 100644
--- a/datapath-windows/ovsext/Switch.h
+++ b/datapath-windows/ovsext/Switch.h
@@ -127,9 +127,10 @@ typedef struct _OVS_SWITCH_CONTEXT
      * 'numPhysicalNics'.
      */
     NDIS_SWITCH_PORT_ID     virtualExternalPortId;
-    NDIS_SWITCH_PORT_ID     internalPortId;
-    POVS_VPORT_ENTRY        virtualExternalVport;   // the virtual adapter vport
-    POVS_VPORT_ENTRY        internalVport;
+    POVS_VPORT_ENTRY        virtualExternalVport;   /* the virtual adapter
+                                                     * vport */
+    INT32                   countInternalVports;    /* the number of internal
+                                                     * vports */
 
     /*
      * 'portIdHashArray' ONLY contains ports that exist on the Hyper-V switch,
diff --git a/datapath-windows/ovsext/Vport.c b/datapath-windows/ovsext/Vport.c
index 7b0103d..fad0350 100644
--- a/datapath-windows/ovsext/Vport.c
+++ b/datapath-windows/ovsext/Vport.c
@@ -81,8 +81,6 @@ static NTSTATUS CreateNetlinkMesgForNetdev(POVS_VPORT_EXT_INFO info,
                                            PVOID outBuffer,
                                            UINT32 outBufLen,
                                            int dpIfIndex);
-static POVS_VPORT_ENTRY OvsFindVportByHvNameW(POVS_SWITCH_CONTEXT switchContext,
-                                              PWSTR wsName, SIZE_T wstrSize);
 static VOID UpdateSwitchCtxWithVport(POVS_SWITCH_CONTEXT switchContext,
                                      POVS_VPORT_ENTRY vport, BOOLEAN newPort);
 static NTSTATUS OvsRemoveTunnelVport(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
@@ -96,7 +94,7 @@ static VOID OvsTunnelVportPendingInit(PVOID context,
 static VOID OvsTunnelVportPendingRemove(PVOID context,
                                         NTSTATUS status,
                                         UINT32 *replyLen);
-static NTSTATUS GetNICAlias(GUID *netCfgInstanceId,
+static NTSTATUS GetNICAlias(PNDIS_SWITCH_NIC_PARAMETERS nicParam,
                             IF_COUNTED_STRING *portFriendlyName);
 
 /*
@@ -331,7 +329,7 @@ HvCreateNic(POVS_SWITCH_CONTEXT switchContext,
 
     if (OvsIsInternalNIC(nicParam->NicType) ||
         OvsIsRealExternalNIC(nicParam->NicType, nicParam->NicIndex)) {
-        GetNICAlias(&nicParam->NetCfgInstanceId, &portFriendlyName);
+        GetNICAlias(nicParam, &portFriendlyName);
     }
 
     NdisAcquireRWLockWrite(switchContext->dispatchLock, &lockState, 0);
@@ -427,7 +425,7 @@ HvConnectNic(POVS_SWITCH_CONTEXT switchContext,
     NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
 
     if (nicParam->NicType == NdisSwitchNicTypeInternal) {
-        OvsInternalAdapterUp(&nicParam->NetCfgInstanceId);
+        OvsInternalAdapterUp(vport->portNo, &nicParam->NetCfgInstanceId);
     }
 
 done:
@@ -464,7 +462,7 @@ HvUpdateNic(POVS_SWITCH_CONTEXT switchContext,
     /* GetNICAlias() must be called outside of a lock. */
     if (nicParam->NicType == NdisSwitchNicTypeInternal ||
         OvsIsRealExternalNIC(nicParam->NicType, nicParam->NicIndex)) {
-        GetNICAlias(&nicParam->NetCfgInstanceId, &portFriendlyName);
+        GetNICAlias(nicParam, &portFriendlyName);
         aliasLookup = TRUE;
     }
 
@@ -607,7 +605,7 @@ HvDisconnectNic(POVS_SWITCH_CONTEXT switchContext,
     NdisReleaseRWLock(switchContext->dispatchLock, &lockState);
 
     if (isInternalPort) {
-        OvsInternalAdapterDown();
+        OvsInternalAdapterDown(vport->portNo, vport->netCfgInstanceId);
     }
 
 done:
@@ -827,10 +825,6 @@ OvsFindVportByPortIdAndNicIndex(POVS_SWITCH_CONTEXT switchContext,
             portId == switchContext->virtualExternalPortId &&
             index == switchContext->virtualExternalVport->nicIndex) {
         return (POVS_VPORT_ENTRY)switchContext->virtualExternalVport;
-    } else if (switchContext->internalVport &&
-               portId == switchContext->internalPortId &&
-               index == switchContext->internalVport->nicIndex) {
-        return (POVS_VPORT_ENTRY)switchContext->internalVport;
     } else {
         PLIST_ENTRY head, link;
         POVS_VPORT_ENTRY vport;
@@ -937,6 +931,8 @@ OvsInitVportWithNicParam(POVS_SWITCH_CONTEXT switchContext,
     } else {
         RtlCopyMemory(&vport->netCfgInstanceId, &nicParam->NetCfgInstanceId,
                       sizeof (nicParam->NetCfgInstanceId));
+        RtlCopyMemory(&vport->nicFriendlyName, &nicParam->NicFriendlyName,
+                      sizeof (nicParam->NicFriendlyName));
     }
     RtlCopyMemory(&vport->nicName, &nicParam->NicName,
                   sizeof (nicParam->NicName));
@@ -1060,11 +1056,12 @@ OvsInitBridgeInternalVport(POVS_VPORT_ENTRY vport)
 /*
  * --------------------------------------------------------------------------
  * For external and internal vports 'portFriendlyName' parameter, provided by
- * Hyper-V, is overwritten with the interface alias name.
+ * Hyper-V, is overwritten with the interface alias name and nic friendly name
+ * equivalent.
  * --------------------------------------------------------------------------
  */
 static NTSTATUS
-GetNICAlias(GUID *netCfgInstanceId,
+GetNICAlias(PNDIS_SWITCH_NIC_PARAMETERS nicParam,
             IF_COUNTED_STRING *portFriendlyName)
 {
     NTSTATUS status = STATUS_SUCCESS;
@@ -1072,7 +1069,13 @@ GetNICAlias(GUID *netCfgInstanceId,
     NET_LUID interfaceLuid = { 0 };
     size_t len = 0;
 
-    status = ConvertInterfaceGuidToLuid(netCfgInstanceId,
+    if (nicParam->NicType == NdisSwitchNicTypeInternal) {
+        RtlCopyMemory(portFriendlyName, &nicParam->NicFriendlyName,
+                      sizeof nicParam->NicFriendlyName);
+    return status;
+    }
+
+    status = ConvertInterfaceGuidToLuid(&nicParam->NetCfgInstanceId,
                                         &interfaceLuid);
     if (status == STATUS_SUCCESS) {
         /*
@@ -1083,9 +1086,9 @@ GetNICAlias(GUID *netCfgInstanceId,
                                              IF_MAX_STRING_SIZE + 1);
         if (status == STATUS_SUCCESS) {
             RtlStringCbPrintfW(portFriendlyName->String,
-                               IF_MAX_STRING_SIZE, L"%s", interfaceName);
+                                IF_MAX_STRING_SIZE, L"%s", interfaceName);
             RtlStringCbLengthW(portFriendlyName->String, IF_MAX_STRING_SIZE,
-                               &len);
+                                &len);
             portFriendlyName->Length = (USHORT)len;
         } else {
             OVS_LOG_ERROR("Fail to convert interface LUID to alias, status: %x",
@@ -1127,8 +1130,7 @@ UpdateSwitchCtxWithVport(POVS_SWITCH_CONTEXT switchContext,
         break;
     case NdisSwitchPortTypeInternal:
         ASSERT(vport->isBridgeInternal == FALSE);
-        switchContext->internalPortId = vport->portId;
-        switchContext->internalVport = vport;
+        switchContext->countInternalVports++;
         break;
     case NdisSwitchPortTypeSynthetic:
     case NdisSwitchPortTypeEmulated:
@@ -1244,9 +1246,9 @@ OvsRemoveAndDeleteVport(PVOID usrParamsContext,
     case OVS_VPORT_TYPE_INTERNAL:
         if (!vport->isBridgeInternal) {
             if (hvDelete && vport->isAbsentOnHv == FALSE) {
-                switchContext->internalPortId = 0;
-                switchContext->internalVport = NULL;
-                OvsInternalAdapterDown();
+                switchContext->countInternalVports--;
+                ASSERT(switchContext->countInternalVports >= 0);
+                OvsInternalAdapterDown(vport->portNo, vport->netCfgInstanceId);
             }
             hvSwitchPort = TRUE;
         }
@@ -1516,7 +1518,7 @@ OvsClearAllSwitchVports(POVS_SWITCH_CONTEXT switchContext)
     }
 
     ASSERT(switchContext->virtualExternalVport == NULL);
-    ASSERT(switchContext->internalVport == NULL);
+    ASSERT(switchContext->countInternalVports == 0);
 }
 
 
@@ -2196,12 +2198,12 @@ OvsNewVportCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
         goto Cleanup;
     }
 
-    if (portType == OVS_VPORT_TYPE_NETDEV) {
-        /* External ports can also be looked up like VIF ports. */
+    if (portType == OVS_VPORT_TYPE_NETDEV ||
+        portType == OVS_VPORT_TYPE_INTERNAL) {
+        /* External and internal ports can also be looked up like VIF ports. */
         vport = OvsFindVportByHvNameA(gOvsSwitchContext, portName);
     } else {
-        ASSERT(OvsIsTunnelVportType(portType) ||
-               portType == OVS_VPORT_TYPE_INTERNAL);
+        ASSERT(OvsIsTunnelVportType(portType));
 
         vport = (POVS_VPORT_ENTRY)OvsAllocateVport();
         if (vport == NULL) {
@@ -2241,8 +2243,6 @@ OvsNewVportCmdHandler(POVS_USER_PARAMS_CONTEXT usrParamsCtx,
                                         transportPortDest);
 
             nlError = NlMapStatusToNlErr(status);
-        } else {
-            OvsInitBridgeInternalVport(vport);
         }
 
         vportInitialized = TRUE;
diff --git a/datapath-windows/ovsext/Vport.h b/datapath-windows/ovsext/Vport.h
index 373896d..00bd931 100644
--- a/datapath-windows/ovsext/Vport.h
+++ b/datapath-windows/ovsext/Vport.h
@@ -79,38 +79,39 @@ typedef struct _OVS_VPORT_FULL_STATS {
  * tunnel type, such as vxlan, gre
  */
 typedef struct _OVS_VPORT_ENTRY {
-    LIST_ENTRY             ovsNameLink;
-    LIST_ENTRY             portIdLink;
-    LIST_ENTRY             portNoLink;
-    LIST_ENTRY             tunnelVportLink;
-
-    OVS_VPORT_STATE        ovsState;
-    OVS_VPORT_TYPE         ovsType;
-    OVS_VPORT_STATS        stats;
-    OVS_VPORT_ERR_STATS    errStats;
-    UINT32                 portNo;
-    UINT32                 mtu;
+    LIST_ENTRY                   ovsNameLink;
+    LIST_ENTRY                   portIdLink;
+    LIST_ENTRY                   portNoLink;
+    LIST_ENTRY                   tunnelVportLink;
+
+    OVS_VPORT_STATE              ovsState;
+    OVS_VPORT_TYPE               ovsType;
+    OVS_VPORT_STATS              stats;
+    OVS_VPORT_ERR_STATS          errStats;
+    UINT32                       portNo;
+    UINT32                       mtu;
     /* ovsName is the ovs (datapath) port name - it is null terminated. */
-    CHAR                   ovsName[OVS_MAX_PORT_NAME_LENGTH];
-
-    PVOID                  priv;
-    NDIS_SWITCH_PORT_ID    portId;
-    NDIS_SWITCH_NIC_INDEX  nicIndex;
-    NDIS_SWITCH_NIC_TYPE   nicType;
-    UINT16                 numaNodeId;
-    NDIS_SWITCH_PORT_STATE portState;
-    NDIS_SWITCH_NIC_STATE  nicState;
-    NDIS_SWITCH_PORT_TYPE  portType;
-
-    UINT8                  permMacAddress[ETH_ADDR_LEN];
-    UINT8                  currMacAddress[ETH_ADDR_LEN];
-    UINT8                  vmMacAddress[ETH_ADDR_LEN];
-
-    NDIS_SWITCH_PORT_NAME  hvPortName;
-    IF_COUNTED_STRING      portFriendlyName;
-    NDIS_SWITCH_NIC_NAME   nicName;
-    NDIS_VM_NAME           vmName;
-    GUID                   netCfgInstanceId;
+    CHAR                         ovsName[OVS_MAX_PORT_NAME_LENGTH];
+
+    PVOID                        priv;
+    NDIS_SWITCH_PORT_ID          portId;
+    NDIS_SWITCH_NIC_INDEX        nicIndex;
+    NDIS_SWITCH_NIC_TYPE         nicType;
+    UINT16                       numaNodeId;
+    NDIS_SWITCH_PORT_STATE       portState;
+    NDIS_SWITCH_NIC_STATE        nicState;
+    NDIS_SWITCH_PORT_TYPE        portType;
+
+    UINT8                        permMacAddress[ETH_ADDR_LEN];
+    UINT8                        currMacAddress[ETH_ADDR_LEN];
+    UINT8                        vmMacAddress[ETH_ADDR_LEN];
+
+    NDIS_SWITCH_PORT_NAME        hvPortName;
+    IF_COUNTED_STRING            portFriendlyName;
+    NDIS_SWITCH_NIC_NAME         nicName;
+    NDIS_SWITCH_NIC_FRIENDLYNAME nicFriendlyName;
+    NDIS_VM_NAME                 vmName;
+    GUID                         netCfgInstanceId;
     /*
      * OVS userpace has a notion of bridges which basically defines an
      * L2-domain. Each "bridge" has an "internal" port of type
@@ -125,12 +126,12 @@ typedef struct _OVS_VPORT_ENTRY {
      * If a flow actions specifies the output port to be a bridge-internal port,
      * the port is silently ignored.
      */
-    BOOLEAN                isBridgeInternal;
-    BOOLEAN                isExternal;
-    UINT32                 upcallPid; /* netlink upcall port id */
-    PNL_ATTR               portOptions;
-    BOOLEAN                isAbsentOnHv; /* Is this port present on the
-                                             Hyper-V switch? */
+    BOOLEAN                      isBridgeInternal;
+    BOOLEAN                      isExternal;
+    UINT32                       upcallPid; /* netlink upcall port id */
+    PNL_ATTR                     portOptions;
+    BOOLEAN                      isAbsentOnHv; /* Is this port present on the
+                                                  Hyper-V switch? */
 } OVS_VPORT_ENTRY, *POVS_VPORT_ENTRY;
 
 struct _OVS_SWITCH_CONTEXT;
@@ -142,6 +143,9 @@ POVS_VPORT_ENTRY OvsFindVportByOvsName(POVS_SWITCH_CONTEXT switchContext,
                                        PSTR name);
 POVS_VPORT_ENTRY OvsFindVportByHvNameA(POVS_SWITCH_CONTEXT switchContext,
                                        PSTR name);
+POVS_VPORT_ENTRY OvsFindVportByHvNameW(POVS_SWITCH_CONTEXT switchContext,
+                                       PWSTR wsName,
+                                       SIZE_T wstrSize);
 POVS_VPORT_ENTRY OvsFindVportByPortIdAndNicIndex(POVS_SWITCH_CONTEXT switchContext,
                                                  NDIS_SWITCH_PORT_ID portId,
                                                  NDIS_SWITCH_NIC_INDEX index);
diff --git a/datapath-windows/ovsext/Vxlan.c b/datapath-windows/ovsext/Vxlan.c
index b89c032..3ac919a 100644
--- a/datapath-windows/ovsext/Vxlan.c
+++ b/datapath-windows/ovsext/Vxlan.c
@@ -282,8 +282,6 @@ OvsDoEncapVxlan(POVS_VPORT_ENTRY vport,
                           IP_DF_NBO : 0;
         ipHdr->ttl = tunKey->ttl ? tunKey->ttl : VXLAN_DEFAULT_TTL;
         ipHdr->protocol = IPPROTO_UDP;
-        ASSERT(tunKey->dst == fwdInfo->dstIpAddr);
-        ASSERT(tunKey->src == fwdInfo->srcIpAddr || tunKey->src == 0);
         ipHdr->saddr = fwdInfo->srcIpAddr;
         ipHdr->daddr = fwdInfo->dstIpAddr;
 
@@ -332,7 +330,8 @@ OvsEncapVxlan(POVS_VPORT_ENTRY vport,
               OvsIPv4TunnelKey *tunKey,
               POVS_SWITCH_CONTEXT switchContext,
               POVS_PACKET_HDR_INFO layers,
-              PNET_BUFFER_LIST *newNbl)
+              PNET_BUFFER_LIST *newNbl,
+              POVS_FWD_INFO switchFwdInfo)
 {
     NTSTATUS status;
     OVS_FWD_INFO fwdInfo;
@@ -340,7 +339,6 @@ OvsEncapVxlan(POVS_VPORT_ENTRY vport,
     status = OvsLookupIPFwdInfo(tunKey->dst, &fwdInfo);
     if (status != STATUS_SUCCESS) {
         OvsFwdIPHelperRequest(NULL, 0, tunKey, NULL, NULL, NULL);
-        // return NDIS_STATUS_PENDING;
         /*
          * XXX: Don't know if the completionList will make any sense when
          * accessed in the callback. Make sure the caveats are known.
@@ -351,6 +349,8 @@ OvsEncapVxlan(POVS_VPORT_ENTRY vport,
         return NDIS_STATUS_FAILURE;
     }
 
+    RtlCopyMemory(switchFwdInfo->value, fwdInfo.value, sizeof fwdInfo.value);
+
     return OvsDoEncapVxlan(vport, curNbl, tunKey, &fwdInfo, layers,
                            switchContext, newNbl);
 }
diff --git a/datapath-windows/ovsext/Vxlan.h b/datapath-windows/ovsext/Vxlan.h
index b9462f0..9a41bbe 100644
--- a/datapath-windows/ovsext/Vxlan.h
+++ b/datapath-windows/ovsext/Vxlan.h
@@ -17,7 +17,11 @@
 #ifndef __VXLAN_H_
 #define __VXLAN_H_ 1
 
+#include "IpHelper.h"
 #include "NetProto.h"
+
+typedef union _OVS_FWD_INFO *POVS_FWD_INFO;
+
 typedef struct _OVS_VXLAN_VPORT {
     UINT16 dstPort;
     UINT64 filterID;
@@ -64,7 +68,8 @@ NDIS_STATUS OvsEncapVxlan(POVS_VPORT_ENTRY vport,
                           OvsIPv4TunnelKey *tunKey,
                           POVS_SWITCH_CONTEXT switchContext,
                           POVS_PACKET_HDR_INFO layers,
-                          PNET_BUFFER_LIST *newNbl);
+                          PNET_BUFFER_LIST *newNbl,
+                          POVS_FWD_INFO switchFwdInfo);
 
 NDIS_STATUS OvsDecapVxlan(POVS_SWITCH_CONTEXT switchContext,
                           PNET_BUFFER_LIST curNbl,
-- 
1.9.5.msysgit.0




More information about the dev mailing list