[mirrororch]: Enable mirror session destination to point into VLAN (s…

…onic-net#595)

* [mirrororch]: Enable mirror session destination to point into VLAN

- Add FdbUpdate notification when manually inserting/removing FDB
  entries

- Refactor MirrorOrch so that it supports:
  1. create mirror session pointing to VLAN
  2. destination port move to VLAN/non-VALN
  3. destination port move to LAG
  Remove unnecessary variables in MirrorEntry

- Add destination IP to the NextHopUpdate message

- Add subnset routes for route observers

Signed-off-by: Shu0T1an ChenG <shuche@microsoft.com>

* [MirrorOrch]: Update comments and fix updateSessionType function issue

* [test]: Update test_mirror.py

orchagent/fdborch.cpp

@@ -454,6 +454,12 @@ bool FdbOrch::addFdbEntry(const FdbEntry& entry, const string& port_name, const
 
     gCrmOrch->incCrmResUsedCounter(CrmResourceType::CRM_FDB_ENTRY);
 
+    FdbUpdate update = {entry, port, true};
+    for (auto observer: m_observers)
+    {
+        observer->update(SUBJECT_TYPE_FDB_CHANGE, &update);
+    }
+
     return true;
 }
 
@@ -485,5 +491,14 @@ bool FdbOrch::removeFdbEntry(const FdbEntry& entry)
 
     gCrmOrch->decCrmResUsedCounter(CrmResourceType::CRM_FDB_ENTRY);
 
+    Port port;
+    m_portsOrch->getPortByBridgePortId(entry.bv_id, port);
+
+    FdbUpdate update = {entry, port, false};
+    for (auto observer: m_observers)
+    {
+        observer->update(SUBJECT_TYPE_FDB_CHANGE, &update);
+    }
+
     return true;
 }

orchagent/intfsorch.cpp

@@ -9,6 +9,7 @@
 #include "logger.h"
 #include "swssnet.h"
 #include "tokenize.h"
+#include "routeorch.h"
 #include "crmorch.h"
 #include "bufferorch.h"
 
@@ -20,6 +21,7 @@ extern sai_neighbor_api_t*          sai_neighbor_api;
 
 extern sai_object_id_t gSwitchId;
 extern PortsOrch *gPortsOrch;
+extern RouteOrch *gRouteOrch;
 extern CrmOrch *gCrmOrch;
 extern BufferOrch *gBufferOrch;
 
@@ -78,6 +80,23 @@ bool IntfsOrch::setRouterIntfsMtu(Port &port)
     return true;
 }
 
+set<IpPrefix> IntfsOrch:: getSubnetRoutes()
+{
+    SWSS_LOG_ENTER();
+
+    set<IpPrefix> subnet_routes;
+
+    for (auto it = m_syncdIntfses.begin(); it != m_syncdIntfses.end(); it++)
+    {
+        for (auto prefix : it->second.ip_addresses)
+        {
+            subnet_routes.emplace(prefix);
+        }
+    }
+
+    return subnet_routes;
+}
+
 void IntfsOrch::doTask(Consumer &consumer)
 {
     SWSS_LOG_ENTER();
@@ -386,6 +405,8 @@ void IntfsOrch::addSubnetRoute(const Port &port, const IpPrefix &ip_prefix)
     {
         gCrmOrch->incCrmResUsedCounter(CrmResourceType::CRM_IPV6_ROUTE);
     }
+
+    gRouteOrch->notifyNextHopChangeObservers(ip_prefix, IpAddresses(), true);
 }
 
 void IntfsOrch::removeSubnetRoute(const Port &port, const IpPrefix &ip_prefix)
@@ -416,6 +437,8 @@ void IntfsOrch::removeSubnetRoute(const Port &port, const IpPrefix &ip_prefix)
     {
         gCrmOrch->decCrmResUsedCounter(CrmResourceType::CRM_IPV6_ROUTE);
     }
+
+    gRouteOrch->notifyNextHopChangeObservers(ip_prefix, IpAddresses(), false);
 }
 
 void IntfsOrch::addIp2MeRoute(const IpPrefix &ip_prefix)

orchagent/intfsorch.h

@@ -33,6 +33,7 @@ class IntfsOrch : public Orch
     void decreaseRouterIntfsRefCount(const string&);
 
     bool setRouterIntfsMtu(Port &port);
+    std::set<IpPrefix> getSubnetRoutes();
 private:
     IntfsTable m_syncdIntfses;
     void doTask(Consumer &consumer);