bankd: Implement new ResetStateReq

Change-Id: Ib794e605162903a2b2c4f4516887ec91fc8d139a

src/bankd/bankd_main.c

@@ -150,6 +150,7 @@ static int bankd_srvc_handle_rx(struct rspro_server_conn *srvc, const RsproPDU_t
 {
 	const CreateMappingReq_t *creq = NULL;
 	const RemoveMappingReq_t *rreq = NULL;
+	struct bankd_worker *worker;
 	struct slot_mapping *map;
 	struct bank_slot bs;
 	struct client_slot cs;
@@ -230,6 +231,19 @@ send_resp:
 		}
 		server_conn_send_rspro(srvc, resp);
 		break;
+	case RsproPDUchoice_PR_resetStateReq:
+		/* delete all slotmaps */
+		slotmap_del_all(g_bankd->slotmaps);
+		/* notify all workers about maps having disappeared */
+		pthread_mutex_lock(&g_bankd->workers_mutex);
+		llist_for_each_entry(worker, &g_bankd->workers, list) {
+			pthread_kill(worker->thread, SIGMAPDEL);
+		}
+		pthread_mutex_unlock(&g_bankd->workers_mutex);
+		/* send response to server */
+		resp = rspro_gen_ResetStateRes(ResultCode_ok);
+		server_conn_send_rspro(srvc, resp);
+		break;
 	default:
 		LOGPFSML(srvc->fi, LOGL_ERROR, "Unknown/Unsupported RSPRO PDU type: %u\n",
 			 pdu->msg.present);

src/slotmap.c

@@ -159,6 +159,19 @@ void slotmap_del(struct slotmaps *maps, struct slot_mapping *map)
 	slotmaps_unlock(maps);
 }
 
+
+/* thread-safe removal of all bank<->client maps */
+void slotmap_del_all(struct slotmaps *maps)
+{
+	struct slot_mapping *map, *map2;
+
+	slotmaps_wrlock(maps);
+	llist_for_each_entry_safe(map, map2, &maps->mappings, list) {
+		_slotmap_del(maps, map);
+	}
+	slotmaps_unlock(maps);
+}
+
 struct slotmaps *slotmap_init(void *ctx)
 {
 	struct slotmaps *sm = talloc_zero(ctx, struct slotmaps);

src/slotmap.h

@@ -83,6 +83,9 @@ struct slot_mapping *slotmap_add(struct slotmaps *maps, const struct bank_slot *
 void slotmap_del(struct slotmaps *maps, struct slot_mapping *map);
 void _slotmap_del(struct slotmaps *maps, struct slot_mapping *map);
 
+/* thread-safe removal of all bank<->client maps */
+void slotmap_del_all(struct slotmaps *maps);
+
 /* initialize the entire map collection */
 struct slotmaps *slotmap_init(void *ctx);