TT#89352 allow create-only mode for call_get_*

Change-Id: I4dd760b14ef1c91d463a2390ff3c52d71acedf4a

daemon/call.c

@@ -3100,7 +3100,7 @@ static struct call *call_create(const str *callid) {
 }
 
 /* returns call with master_lock held in W */
-struct call *call_get_or_create(const str *callid, bool foreign) {
+struct call *call_get_or_create(const str *callid, bool foreign, bool exclusive) {
 	struct call *c;
 
 restart:
@@ -3157,12 +3157,17 @@ restart:
 			mqtt_timer_start(&c->mqtt_timer, c, NULL);
 	}
 	else {
-		obj_hold(c);
-		rwlock_lock_w(&c->master_lock);
+		if (exclusive)
+			c = NULL;
+		else {
+			obj_hold(c);
+			rwlock_lock_w(&c->master_lock);
+		}
 		rwlock_unlock_r(&rtpe_callhash_lock);
 	}
 
-	log_info_call(c);
+	if (c)
+		log_info_call(c);
 	return c;
 }
 
@@ -3188,7 +3193,7 @@ struct call *call_get(const str *callid) {
 /* returns call with master_lock held in W, or possibly NULL iff opmode == OP_ANSWER */
 struct call *call_get_opmode(const str *callid, enum call_opmode opmode) {
 	if (opmode == OP_OFFER)
-		return call_get_or_create(callid, false);
+		return call_get_or_create(callid, false, false);
 	return call_get(callid);
 }
 

daemon/call_interfaces.c

@@ -1401,7 +1401,7 @@ static const char *call_offer_answer_ng(struct ng_buffer *ngbuf, bencode_item_t
 			goto out;
 		}
 
-		call = call_get_or_create(&flags.call_id, false);
+		call = call_get_or_create(&flags.call_id, false, false);
 	}
 
 	errstr = "Unknown call-id";

daemon/redis.c

@@ -1826,7 +1826,7 @@ static void json_restore_call(struct redis *r, const str *callid, bool foreign)
 	if (!root_reader)
 		goto err1;
 
-	c = call_get_or_create(callid, foreign);
+	c = call_get_or_create(callid, foreign, false);
 	err = "failed to create call struct";
 	if (!c)
 		goto err1;

include/call.h

@@ -536,7 +536,7 @@ void free_sink_handler(void *);
 void __add_sink_handler(GQueue *, struct packet_stream *);
 
 
-struct call *call_get_or_create(const str *callid, bool foreign);
+struct call *call_get_or_create(const str *callid, bool foreign, bool exclusive);
 struct call *call_get_opmode(const str *callid, enum call_opmode opmode);
 void call_make_own_foreign(struct call *c, bool foreign);
 int call_get_mono_dialogue(struct call_monologue *dialogue[2], struct call *call, const str *fromtag,