Added changes to handle dependency check in FdbSyncd and FpmSyncd for warm-boot

fdbsyncd/fdbsync.cpp

@@ -43,6 +43,66 @@ FdbSync::~FdbSync()
     }
 }
 
+
+// Check if interface entries are restored in kernel
+bool FdbSync::isIntfRestoreDone()
+{
+    vector<string> required_modules = {
+            "vxlanmgrd",
+            "intfmgrd",
+            "vlanmgrd",
+            "vrfmgrd"
+        };
+
+    for(string& module : required_modules)
+    {
+        WarmStart::WarmStartState state;
+
+        WarmStart::getWarmStartState(module, state);
+        if(state == WarmStart::REPLAYED || state == WarmStart::RECONCILED)
+        {
+            SWSS_LOG_INFO("Module %s Replayed or Reconciled %d",module.c_str(), (int) state);            
+        }
+        else
+        {
+            SWSS_LOG_INFO("Module %s NOT Replayed or Reconciled %d",module.c_str(), (int) state);            
+            //return false;
+            // Return true till all the dependant code is checked in
+            return true;
+        }
+    }
+
+    return true;
+}
+
+// Check if vxlan entries are re-conciled to kernel 
+bool FdbSync::isReadyToReconcile()
+{
+    vector<string> required_modules = {
+        "orchagent",
+    };
+
+    for(string& module : required_modules)
+    {
+        WarmStart::WarmStartState state;
+
+        WarmStart::getWarmStartState(module, state);
+        if(state == WarmStart::RECONCILED)
+        {
+            SWSS_LOG_INFO("Module %s Reconciled %d",module.c_str(), (int) state);            
+        }
+        else
+        {
+            SWSS_LOG_INFO("Module %s NOT Reconciled %d",module.c_str(), (int) state);            
+            //return false;
+            // Return True untill the dependant orchagent code is commited
+            return true;
+        }
+    }
+
+    return true;
+}
+
 void FdbSync::processCfgEvpnNvo()
 {
     std::deque<KeyOpFieldsValuesTuple> entries;
@@ -447,14 +507,17 @@ void FdbSync::macDelVxlanDB(string key)
     fvVector.push_back(t);
     fvVector.push_back(v);
 
+    SWSS_LOG_NOTICE("%sVXLAN_FDB_TABLE: DEL_KEY %s vtep:%s type:%s", 
+            m_AppRestartAssist->isWarmStartInProgress() ? "WARM-RESTART:" : "" ,
+            key.c_str(), vtep.c_str(), type.c_str());
+
     // If warmstart is in progress, we take all netlink changes into the cache map
     if (m_AppRestartAssist->isWarmStartInProgress())
     {
         m_AppRestartAssist->insertToMap(APP_VXLAN_FDB_TABLE_NAME, key, fvVector, true);
         return;
     }
 
-    SWSS_LOG_INFO("VXLAN_FDB_TABLE: DEL_KEY %s vtep:%s type:%s", key.c_str(), vtep.c_str(), type.c_str());
     m_fdbTable.del(key);
     return;
 
@@ -476,14 +539,16 @@ void FdbSync::macAddVxlan(string key, struct in_addr vtep, string type, uint32_t
     fvVector.push_back(t);
     fvVector.push_back(v);
 
+    SWSS_LOG_INFO("%sVXLAN_FDB_TABLE: ADD_KEY %s vtep:%s type:%s", 
+            m_AppRestartAssist->isWarmStartInProgress() ? "WARM-RESTART:" : "" ,
+            key.c_str(), svtep.c_str(), type.c_str());
     // If warmstart is in progress, we take all netlink changes into the cache map
     if (m_AppRestartAssist->isWarmStartInProgress())
     {
         m_AppRestartAssist->insertToMap(APP_VXLAN_FDB_TABLE_NAME, key, fvVector, false);
         return;
     }
 
-    SWSS_LOG_INFO("VXLAN_FDB_TABLE: ADD_KEY %s vtep:%s type:%s", key.c_str(), svtep.c_str(), type.c_str());
     m_fdbTable.set(key, fvVector);
 
     return;

fdbsyncd/fdbsync.h

@@ -10,7 +10,16 @@
 #include "warmRestartAssist.h"
 
 // The timeout value (in seconds) for fdbsyncd reconcilation logic
-#define DEFAULT_FDBSYNC_WARMSTART_TIMER 30
+#define DEFAULT_FDBSYNC_WARMSTART_TIMER 600
+
+// Time to wait to run fdb reconcillation after fdbsyncd replay
+#define FDBSYNC_RECON_TIMER 120
+/*
+ * This is the MAX time in seconds, fdbsyncd will wait after warm-reboot
+ * for the interface entries to be recreated in kernel before attempting to 
+ * write the FDB data to kernel
+ */
+#define WARM_RESTORE_WAIT_TIME_OUT_MAX 180
 
 namespace swss {
 
@@ -43,7 +52,8 @@ class FdbSync : public NetMsg
 
     virtual void onMsg(int nlmsg_type, struct nl_object *obj);
 
-    bool isFdbRestoreDone();
+    bool isIntfRestoreDone();
+    bool isReadyToReconcile();    
 
     AppRestartAssist *getRestartAssist()
     {

fdbsyncd/fdbsyncd.cpp

@@ -35,6 +35,8 @@ int main(int argc, char **argv)
             Selectable *temps;
             int ret;
             Select s;
+            SelectableTimer replayCheckTimer(timespec{0, 0});
+            SelectableTimer reconCheckTimer(timespec{0, 0});
 
             using namespace std::chrono;
 
@@ -44,8 +46,28 @@ int main(int argc, char **argv)
              */
             if (sync.getRestartAssist()->isWarmStartInProgress())
             {
+                int pasttime = 0;                
                 sync.getRestartAssist()->readTablesToMap();
+
+                while (!sync.isIntfRestoreDone())
+                {
+                    if (pasttime++ > WARM_RESTORE_WAIT_TIME_OUT_MAX)
+                    {
+                        SWSS_LOG_INFO("timed-out before all interface data was replayed to kernel!!!");
+                        break;
+                    }
+                    sleep(1);
+                }
                 SWSS_LOG_NOTICE("Starting ReconcileTimer");
+                sync.getRestartAssist()->startReconcileTimer(s);
+                replayCheckTimer.setInterval(timespec{1, 0});
+                replayCheckTimer.start();
+                s.addSelectable(&replayCheckTimer);
+            }
+            else
+            {
+                sync.getRestartAssist()->warmStartDisabled();
+                sync.m_reconcileDone = true;
             }
 
             netlink.registerGroup(RTNLGRP_LINK);
@@ -67,14 +89,51 @@ int main(int argc, char **argv)
             {
                 s.select(&temps);
 
-                if(temps == (Selectable *)sync.getFdbStateTable())
+                if (temps == (Selectable *)sync.getFdbStateTable())
                 {
                     sync.processStateFdb();
                 }
                 else if (temps == (Selectable *)sync.getCfgEvpnNvoTable())
                 {
                     sync.processCfgEvpnNvo();
                 }
+                else if (temps == &replayCheckTimer)
+                {
+                    if (sync.getFdbStateTable()->empty() && sync.getCfgEvpnNvoTable()->empty())
+                    {
+                        sync.getRestartAssist()->appDataReplayed();
+                        SWSS_LOG_NOTICE("FDB Replay Complete,  Start Reconcile Check");
+                        reconCheckTimer.setInterval(timespec{FDBSYNC_RECON_TIMER, 0});
+                        reconCheckTimer.start();
+                        s.addSelectable(&reconCheckTimer);
+                    }
+                    else
+                    {
+                        replayCheckTimer.setInterval(timespec{1, 0});
+                        // re-start replay check timer
+                        replayCheckTimer.start();
+                    }
+
+                }
+                else if (temps == &reconCheckTimer)
+                {
+                    if (sync.isReadyToReconcile())
+                    {
+                        if (sync.getRestartAssist()->isWarmStartInProgress())
+                        {
+                            sync.m_reconcileDone = true;
+                            sync.getRestartAssist()->stopReconcileTimer(s);
+                            sync.getRestartAssist()->reconcile();
+                            SWSS_LOG_NOTICE("VXLAN FDB VNI Reconcillation Complete (Event)");
+                        }
+                    }
+                    else
+                    {
+                        reconCheckTimer.setInterval(timespec{1, 0});
+                        // Restart and check again in 1 sec
+                        reconCheckTimer.start();
+                    }
+                }
                 else
                 {
                     /*

fpmsyncd/fpmsyncd.cpp

@@ -16,7 +16,9 @@ using namespace swss;
  * Default warm-restart timer interval for routing-stack app. To be used only if
  * no explicit value has been defined in configuration.
  */
-const uint32_t DEFAULT_ROUTING_RESTART_INTERVAL = 120;
+const uint32_t DEFAULT_ROUTING_RESTART_INTERVAL = 600;
+
+const uint32_t DEFAULT_ROUTING_RECON_CHECK_INTERVAL = 120;
 
 // Wait 3 seconds after detecting EOIU reached state
 // TODO: support eoiu hold interval config
@@ -67,6 +69,10 @@ int main(int argc, char **argv)
             SelectableTimer eoiuCheckTimer(timespec{0, 0});
             // After eoiu flags are detected, start a hold timer before starting reconciliation.
             SelectableTimer eoiuHoldTimer(timespec{0, 0});
+
+            // Timers to wait for dependent reconcillation
+            SelectableTimer reconcileCheckTimer(timespec{0, 0});
+            SelectableTimer reconcileHoldTimer(timespec{0, 0});
             /*
              * Pipeline should be flushed right away to deal with state pending
              * from previous try/catch iterations.
@@ -85,13 +91,14 @@ int main(int argc, char **argv)
             {
                 /* Obtain warm-restart timer defined for routing application */
                 time_t warmRestartIval = sync.m_warmStartHelper.getRestartTimer();
+                warmStartTimer.setInterval(timespec{DEFAULT_ROUTING_RESTART_INTERVAL, 0});
                 if (!warmRestartIval)
                 {
-                    warmStartTimer.setInterval(timespec{DEFAULT_ROUTING_RESTART_INTERVAL, 0});
+                    reconcileCheckTimer.setInterval(timespec{DEFAULT_ROUTING_RECON_CHECK_INTERVAL, 0});
                 }
                 else
                 {
-                    warmStartTimer.setInterval(timespec{warmRestartIval, 0});
+                    reconcileCheckTimer.setInterval(timespec{warmRestartIval, 0});
                 }
 
                 /* Execute restoration instruction and kick off warm-restart timer */
@@ -100,6 +107,9 @@ int main(int argc, char **argv)
                     warmStartTimer.start();
                     s.addSelectable(&warmStartTimer);
                     SWSS_LOG_NOTICE("Warm-Restart timer started.");
+                    reconcileCheckTimer.start();
+                    s.addSelectable(&reconcileCheckTimer);
+                    SWSS_LOG_NOTICE("reconcileCheckTimer timer started ");
                 }
 
                 // Also start periodic eoiu check timer, first wait 5 seconds, then check every 1 second
@@ -108,6 +118,10 @@ int main(int argc, char **argv)
                 s.addSelectable(&eoiuCheckTimer);
                 SWSS_LOG_NOTICE("Warm-Restart eoiuCheckTimer timer started.");
             }
+            else
+            {
+                sync.m_warmStartHelper.setState(WarmStart::WSDISABLED);
+            }
 
             while (true)
             {
@@ -122,17 +136,26 @@ int main(int argc, char **argv)
                  * select() loop.
                  * Note:  route reconciliation always succeeds, it will not be done twice.
                  */
-                if (temps == &warmStartTimer || temps == &eoiuHoldTimer)
+                if (temps == &warmStartTimer || temps == &eoiuHoldTimer || temps == &reconcileHoldTimer)
                 {
+					bool readyToReconcile = false;                    
                     if (temps == &warmStartTimer)
                     {
+						readyToReconcile = true;
                         SWSS_LOG_NOTICE("Warm-Restart timer expired.");
                     }
+                    else if (temps == &reconcileHoldTimer)
+                    {
+                        readyToReconcile = true;
+                        SWSS_LOG_NOTICE("Warm-Restart reconcile hold timer expired.");
+                    }
                     else
                     {
+						readyToReconcile = sync.isReadyToReconcile();
                         SWSS_LOG_NOTICE("Warm-Restart EOIU hold timer expired.");
                     }
-                    if (sync.m_warmStartHelper.inProgress())
+
+                    if (sync.m_warmStartHelper.inProgress() && readyToReconcile)
                     {
                         sync.m_warmStartHelper.reconcile();
                         SWSS_LOG_NOTICE("Warm-Restart reconciliation processed.");
@@ -174,6 +197,30 @@ int main(int argc, char **argv)
                     {
                         s.removeSelectable(&eoiuCheckTimer);
                     }
+                }          
+                else if (temps == &reconcileCheckTimer)
+                {
+                    SWSS_LOG_NOTICE("reconcile Check timer Expired ");
+                    if (sync.m_warmStartHelper.inProgress())
+                    {
+                        if (sync.isReadyToReconcile())
+                        {
+                            reconcileHoldTimer.setInterval(timespec{2, 0});
+                            reconcileHoldTimer.start();
+                            s.addSelectable(&reconcileHoldTimer);
+                            SWSS_LOG_NOTICE("Warm-Restart started reconcile hold timer ");
+                            s.removeSelectable(&reconcileCheckTimer);
+                            continue;
+                        }
+                        // re-start check timer for every 2 seconds now on
+                        reconcileCheckTimer.setInterval(timespec{2, 0});
+                        reconcileCheckTimer.start();
+                        SWSS_LOG_NOTICE("Warm-Restart reconcileCheckTimer restarted");
+                    }
+                    else
+                    {
+                        s.removeSelectable(&reconcileCheckTimer);
+                    }
                 }
                 else if (!warmStartEnabled || sync.m_warmStartHelper.isReconciled())
                 {

fpmsyncd/routesync.cpp

@@ -912,3 +912,31 @@ string RouteSync::getNextHopIf(struct rtnl_route *route_obj)
 
     return result;
 }
+
+// Check if ependent entries are re-conciled 
+bool RouteSync::isReadyToReconcile()
+{
+    vector<string> required_modules = {
+            "orchagent",
+        };
+
+    for(string& module : required_modules)
+    {
+        WarmStart::WarmStartState state;
+
+        WarmStart::getWarmStartState(module, state);
+        if(state == WarmStart::RECONCILED || state == WarmStart::WSDISABLED)
+        {
+            SWSS_LOG_INFO("Module %s Reconciled %d",module.c_str(), (int) state);            
+        }
+        else
+        {
+            SWSS_LOG_INFO("Module %s NOT Reconciled %d",module.c_str(), (int) state);            
+            //return false;
+            //Return true untill dependent module code is commited
+            return true;
+        }
+    }
+
+    return true;
+}

fpmsyncd/routesync.h

@@ -26,6 +26,9 @@ class RouteSync : public NetMsg
     virtual void onMsg(int nlmsg_type, struct nl_object *obj);
 
     virtual void onMsgRaw(struct nlmsghdr *obj);
+
+    bool isReadyToReconcile();
+
     WarmStartHelper  m_warmStartHelper;
 
 private: