profiling: add option to active rules profiling at start

When replaying a pcap file, it is not possible to get rules
profiling because it has to be activated from the unix socket.
This patch adds a new option to be able to activate profiling
collection at start so a pcap run can get rules profiling
information.

src/util-profiling.c

@@ -1432,6 +1432,7 @@ void SCProfilingInit(void)
     SC_ATOMIC_INIT(profiling_rules_active);
     SC_ATOMIC_INIT(samples);
     intmax_t rate_v = 0;
+    ConfNode *conf;
 
     (void)ConfGetInt("profiling.sample-rate", &rate_v);
     if (rate_v > 0 && rate_v < INT_MAX) {
@@ -1448,6 +1449,11 @@ void SCProfilingInit(void)
         else
             SCLogInfo("profiling runs for every packet");
     }
+
+    conf = ConfGetNode("profiling.rules");
+    if (ConfNodeChildValueIsTrue(conf, "active")) {
+        SC_ATOMIC_SET(profiling_rules_active, 1);
+    }
 }
 
 /* see if we want to profile rules for this packet */

suricata.yaml.in

@@ -1810,6 +1810,10 @@ profiling:
     enabled: yes
     filename: rule_perf.log
     append: yes
+    # Set active to yes to enable rules profiling at start
+    # if set to no (default), the rules profiling will have to be started
+    # via unix socket commands.
+    #active:no
 
     # Sort options: ticks, avgticks, checks, matches, maxticks
     # If commented out all the sort options will be used.