Copp changes for supporting genetlink in vs (sonic-net#522)

Author: Sudharsan D.G

tests/aspell.en.pws

@@ -69,6 +69,7 @@ FDBs
 filename
 FIXME
 FlexCounter
+genetlink
 getInstance
 getSwitchId
 getVid
@@ -111,10 +112,12 @@ metadata
 mlnx
 mpls
 MTU
+multicast
 mutex
 mutexes
 namespace
 namespaces
+netdev
 NHG
 nhgm
 nlog

vslib/src/sai_vs_hostintf.cpp

@@ -1122,6 +1122,16 @@ sai_status_t vs_create_hostif_tap_interface(
         return SAI_STATUS_FAILURE;
     }
 
+    /* The genetlink host interface is created to associate trap group to genetlink family and multicast group
+     * created by driver. It does not create any netdev interface. Hence skipping tap interface creation
+     */
+    if (attr_type->value.s32 == SAI_HOSTIF_TYPE_GENETLINK)
+    {
+        SWSS_LOG_DEBUG("Skipping tap create for hostif type genetlink");
+
+        return SAI_STATUS_SUCCESS;
+    }
+
     if (attr_type->value.s32 != SAI_HOSTIF_TYPE_NETDEV)
     {
         SWSS_LOG_ERROR("only SAI_HOSTIF_TYPE_NETDEV is supported");