[ovs-dev] datapath-windows: Add CTA_HELP and CTA_TUPLE_MASTER

Alin Serdean aserdean at cloudbasesolutions.com
Tue Jun 30 09:34:18 UTC 2020

Thanks for sending the patch.

Running the command:
make datapath_windows_analyze
resulted in the following:
ovsext\Conntrack.c(873): warning C28167: The function 'OvsCtExecute_' changes the IRQL and does not
restore the IRQL before it exits. It should be annotated to reflect the change or the IRQL should
be restored. IRQL was last set to 2 at line 955.

There is a lock acquired but it is not released on the failure path.

You can fold in following incremental:

$ git diff datapath-windows/ovsext/Conntrack.c
diff --git a/datapath-windows/ovsext/Conntrack.c b/datapath-windows/ovsext/Conntrack.c
index 414b3f4b2..717d04f49 100644
--- a/datapath-windows/ovsext/Conntrack.c
+++ b/datapath-windows/ovsext/Conntrack.c
@@ -974,6 +974,7 @@ OvsCtExecute_(OvsForwardingContext *fwdCtx,
         if (!entry->helper_name) {
             OVS_LOG_ERROR("Error while allocating memory");
+            OVS_RELEASE_SPIN_LOCK(&(entry->lock), irql);
             return NDIS_STATUS_RESOURCES;

The rest looks good, but I have the following question:

     /* FTP ACTIVE - Server initiates the connection */
     if ((incomingKey.src.addr.ipv4 == entryKey.src.addr.ipv4) &&
-        (incomingKey.src.port == entryKey.src.port) &&
Why is the line above removed?


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