defrag: add defrag.mgr.tracker_timeout counter

Updated by flow manager.

etc/schema.json

@@ -5227,6 +5227,15 @@
                                 }
                             },
                             "additionalProperties": false
+                        },
+                        "mgr": {
+                            "type": "object",
+                            "properties": {
+                                "tracker_timeout": {
+                                    "type": "integer"
+                                }
+                            },
+                            "additionalProperties": false
                         }
                     },
                     "additionalProperties": false

src/flow-manager.c

@@ -606,6 +606,7 @@ typedef struct FlowManagerThreadData_ {
     FlowCounters cnt;
 
     FlowManagerTimeoutThread timeout;
+    uint16_t counter_defrag_timeout;
 } FlowManagerThreadData;
 
 static void FlowCountersInit(ThreadVars *t, FlowCounters *fc)
@@ -678,6 +679,7 @@ static TmEcode FlowManagerThreadInit(ThreadVars *t, const void *initdata, void *
     *data = ftd;
 
     FlowCountersInit(t, &ftd->cnt);
+    ftd->counter_defrag_timeout = StatsRegisterCounter("defrag.mgr.tracker_timeout", t);
 
     PacketPoolInit();
     return TM_ECODE_OK;
@@ -875,7 +877,10 @@ static TmEcode FlowManager(ThreadVars *th_v, void *thread_data)
         }
         if (other_last_sec == 0 || other_last_sec < (uint32_t)SCTIME_SECS(ts)) {
             if (ftd->instance == 0) {
-                DefragTimeoutHash(ts);
+                uint32_t defrag_cnt = DefragTimeoutHash(ts);
+                if (defrag_cnt) {
+                    StatsAddUI64(th_v, ftd->counter_defrag_timeout, defrag_cnt);
+                }
                 HostTimeoutHash(ts);
                 IPPairTimeoutHash(ts);
                 HttpRangeContainersTimeoutHash(ts);