[ovs-dev] [PATCH] [PATCH v4] datapath-windows: Output to multiple VXLAN ports

[Alin Serdean]

If we have a flow rule of the following form:
 actions=strip_vlan,set_tunnel:0x3e9,15,16,17 (Where port 15, 16 and 17 are
 VXLAN OF ports with different tunnelling information)

Current implementation is that if a packet will hit that specific flow,
only one packet will be sent out with the first tunnelling information.

This patch saves the initial packet source port for further use of the
currently implemented pipeline and ignores the latter if it
is the last tunnelling port.

Signed-off-by: Alin Gabriel Serdean <aserdean at cloudbasesolutions.com>
---
This patch should also be applied on 2.4
v5 Do not save the save the NIC index and source port ID.
v4 Relax condition when saving ports.
v3 Fix formatting.
v2 Address comments.
---
---
 datapath-windows/ovsext/Actions.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/datapath-windows/ovsext/Actions.c b/datapath-windows/ovsext/Actions.c
index c8de7c5..bfe5d7f 100644
--- a/datapath-windows/ovsext/Actions.c
+++ b/datapath-windows/ovsext/Actions.c
@@ -947,7 +947,6 @@ OvsOutputBeforeSetAction(OvsForwardingContext *ovsFwdCtx)
 {
     PNET_BUFFER_LIST newNbl;
     NDIS_STATUS status = NDIS_STATUS_SUCCESS;
-    PNET_BUFFER nb;
 
     /*
      * Create a copy and work on the copy after this point. The original NBL is
@@ -967,14 +966,14 @@ OvsOutputBeforeSetAction(OvsForwardingContext *ovsFwdCtx)
      * XXX Head room needs to include the additional encap.
      * XXX copySize check is not considering multiple NBs.
      */
-    nb = NET_BUFFER_LIST_FIRST_NB(ovsFwdCtx->curNbl);
     newNbl = OvsPartialCopyNBL(ovsFwdCtx->switchContext, ovsFwdCtx->curNbl,
                                0, 0, TRUE /*copy NBL info*/);
 
     ASSERT(ovsFwdCtx->destPortsSizeOut > 0 ||
            ovsFwdCtx->tunnelTxNic != NULL || ovsFwdCtx->tunnelRxNic != NULL);
 
-    /* Send the original packet out */
+    /* Send the original packet out and save the original source port number */
+    UINT32 tempVportNo = ovsFwdCtx->srcVportNo;
     status = OvsOutputForwardingCtx(ovsFwdCtx);
     ASSERT(ovsFwdCtx->curNbl == NULL);
     ASSERT(ovsFwdCtx->destPortsSizeOut == 0);
@@ -992,7 +991,7 @@ OvsOutputBeforeSetAction(OvsForwardingContext *ovsFwdCtx)
         OvsCompleteNBL(ovsFwdCtx->switchContext, newNbl, TRUE);
     } else {
         status = OvsInitForwardingCtx(ovsFwdCtx, ovsFwdCtx->switchContext,
-                                      newNbl, ovsFwdCtx->srcVportNo, 0,
+                                      newNbl, tempVportNo, 0,
                                       NET_BUFFER_LIST_SWITCH_FORWARDING_DETAIL(newNbl),
                                       ovsFwdCtx->completionList,
                                       &ovsFwdCtx->layers, FALSE);
-- 
1.9.5.msysgit.0