[warm reboot] Warm Reboot Support for EVPN VXLAN (#350)

* [warm reboot] Warm Reboot Support for EVPN VXLAN Co-authored-by: Nikhil Kelapure <nikhil.kelapure@broadcom.com>
sonic-net · Oct 12, 2020 · 0253214 · 0253214
1 parent 92a35d9
commit 0253214
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Showing 2 changed files with 45 additions and 1 deletion.
diff --git a/common/warm_restart.cpp b/common/warm_restart.cpp
@@ -10,7 +10,10 @@ const WarmStart::WarmStartStateNameMap WarmStart::warmStartStateNameMap =
 {
     {INITIALIZED,   "initialized"},
     {RESTORED,      "restored"},
-    {RECONCILED,    "reconciled"}
+    {REPLAYED,      "replayed"},
+    {RECONCILED,    "reconciled"},
+    {WSDISABLED,    "disabled"},
+    {WSUNKNOWN,     "unknown"}
 };
 
 const WarmStart::DataCheckStateNameMap WarmStart::dataCheckStateNameMap =
@@ -181,6 +184,41 @@ bool WarmStart::isSystemWarmRebootEnabled(void)
     return warmStart.m_systemWarmRebootEnabled;
 }
 
+void WarmStart::getWarmStartState(const std::string &app_name, WarmStartState &state)
+{
+    std::string statestr;
+
+    auto& warmStart = getInstance();
+
+    state = RECONCILED;
+
+    if (!isWarmStart())
+    {
+        return;
+    }
+
+    warmStart.m_stateWarmRestartTable->hget(app_name, "state", statestr);
+
+    /* If warm-start is enabled, state cannot be assumed as Reconciled
+     * It should be set to unknown
+     */
+    state = WSUNKNOWN;
+
+    for (auto it = warmStartStateNameMap.begin(); it != warmStartStateNameMap.end(); it++)
+    {
+        if (it->second == statestr)
+        {
+            state = it->first;
+            break;
+        }
+    }
+
+    SWSS_LOG_INFO("%s warm start state get %s(%d)",
+                    app_name.c_str(), statestr.c_str(), state);
+
+    return;
+}
+
 // Set the WarmStart FSM state for a particular application.
 void WarmStart::setWarmStartState(const std::string &app_name, WarmStartState state)
 {

diff --git a/common/warm_restart.h b/common/warm_restart.h
@@ -17,7 +17,10 @@ class WarmStart
     {
         INITIALIZED,
         RESTORED,
+        REPLAYED,
         RECONCILED,
+        WSDISABLED,
+        WSUNKNOWN,
     };
 
     enum DataCheckState
@@ -54,6 +57,9 @@ class WarmStart
 
     static bool isSystemWarmRebootEnabled(void);
 
+    static void getWarmStartState(const std::string &app_name,
+                                  WarmStartState    &state);
+
     static void setWarmStartState(const std::string &app_name,
                                   WarmStartState     state);