switch to libosmocore multihread-logging

When osmo-remsim was originally developed, libosmocore logging was
not yet thread-safe.  This meant that the worker threads of remsim-bankd
and remsim-server could not log via the libosmocore logging framework
but directly used stderr/stdout, which produced rather inconsistent log
output.

However, since 1.3.0, libosmocore has received support for
multi-threaded applications.  Let's make use of this and consistently
use it in remsim-server and remsim-bankd.  This obviously also means
adding some more log categories.

Change-Id: I7bd5264c559b756927046563a2d00c54826bee9b

src/bankd/bankd.h

@@ -20,8 +20,8 @@
 extern struct value_string worker_state_names[];
 
 #define LOGW(w, fmt, args...) \
-	printf("[%03u %s] %s:%u " fmt, (w)->num, get_value_string(worker_state_names, (w)->state), \
-		__FILE__, __LINE__, ## args)
+	LOGP(DBANKDW, LOGL_INFO, "[%03u %s] " fmt, (w)->num, get_value_string(worker_state_names, (w)->state), \
+		## args)
 
 struct bankd;
 

src/bankd/bankd_main.c

@@ -80,6 +80,8 @@ static void bankd_init(struct bankd *bankd)
 	log_set_print_category(osmo_stderr_target, 1);
 	log_set_print_category_hex(osmo_stderr_target, 0);
 	osmo_fsm_log_addr(0);
+	log_set_print_tid(osmo_stderr_target, 1);
+	log_enable_multithread();
 
 	asn_debug = 0;
 

src/debug.c

@@ -41,6 +41,21 @@ static const struct log_info_cat default_categories[] = {
 		.loglevel = LOGL_INFO,
 		.enabled = 1,
 	},
+	[DREST] = {
+		.name = "DREST",
+		.loglevel = LOGL_INFO,
+		.enabled = 1,
+	},
+	[DSLOTMAP] = {
+		.name = "DSLOTMAP",
+		.loglevel = LOGL_INFO,
+		.enabled = 1,
+	},
+	[DBANKDW] = {
+		.name = "DBANKDW",
+		.loglevel = LOGL_INFO,
+		.enabled = 1,
+	},
 };
 
 const struct log_info log_info = {

src/debug.h

@@ -5,6 +5,9 @@ enum {
 	DMAIN,
 	DST2,
 	DRSPRO,
+	DREST,
+	DSLOTMAP,
+	DBANKDW,
 };
 
 extern const struct log_info log_info;

src/server/remsim_server.c

@@ -93,6 +93,8 @@ int main(int argc, char **argv)
 	log_set_print_category(osmo_stderr_target, 1);
 	log_set_print_category_hex(osmo_stderr_target, 0);
 	osmo_fsm_log_addr(0);
+	log_set_print_tid(osmo_stderr_target, 1);
+	log_enable_multithread();
 
 	handle_options(argc, argv);
 

src/server/rest_api.c

@@ -304,7 +304,7 @@ static void trigger_main_thread_via_eventfd(void)
 
 	rc = write(g_event_ofd.fd, &one, sizeof(one));
 	if (rc < 8)
-		fprintf(stderr, "Error writing to eventfd(): %d\n", rc);
+		LOGP(DREST, LOGL_ERROR, "Error writing to eventfd(): %d\n", rc);
 }
 
 static int api_cb_slotmaps_post(const struct _u_request *req, struct _u_response *resp, void *user_data)
@@ -318,7 +318,7 @@ static int api_cb_slotmaps_post(const struct _u_request *req, struct _u_response
 
 	json_req = ulfius_get_json_body_request(req, &json_err);
 	if (!json_req) {
-		fprintf(stderr, "REST: No JSON Body\n");
+		LOGP(DREST, LOGL_NOTICE, "REST: No JSON Body\n");
 		goto err;
 	}
 
@@ -327,7 +327,7 @@ static int api_cb_slotmaps_post(const struct _u_request *req, struct _u_response
 		goto err;
 	map = slotmap_add(g_rps->slotmaps, &slotmap.bank, &slotmap.client);
 	if (!map) {
-		fprintf(stderr, "REST: Cannot add slotmap\n");
+		LOGP(DREST, LOGL_NOTICE, "REST: Cannot add slotmap\n");
 		goto err;
 	}
 	slotmap_state_change(map, SLMAP_S_NEW, NULL);
@@ -511,7 +511,7 @@ int rest_api_init(void *ctx, uint16_t port)
 		ulfius_add_endpoint(&g_instance, &api_endpoints[i]);
 
 	if (ulfius_start_framework(&g_instance) != U_OK) {
-		fprintf(stderr, "Cannot start REST API on port %u\n", port);
+		LOGP(DREST, LOGL_FATAL, "Cannot start REST API on port %u\n", port);
 		return -1;
 	}
 	return 0;

src/server/rspro_server.c

@@ -709,11 +709,11 @@ int event_fd_cb(struct osmo_fd *ofd, unsigned int what)
 	/* read from the socket to "confirm" the event and make it non-readable again */
 	rc = read(ofd->fd, &value, 8);
 	if (rc < 8) {
-		fprintf(stderr, "Error reading eventfd: %d\n", rc);
+		LOGP(DMAIN, LOGL_ERROR, "Error reading eventfd: %d\n", rc);
 		return rc;
 	}
 
-	printf("rspro_server: Event FD arrived, checking for any pending work\n");
+	LOGP(DMAIN, LOGL_INFO, "Event FD arrived, checking for any pending work\n");
 
 	pthread_rwlock_rdlock(&srv->rwlock);
 	llist_for_each_entry(conn, &srv->banks, list) {

src/slotmap.c

@@ -103,14 +103,14 @@ struct slot_mapping *slotmap_add(struct slotmaps *maps, const struct bank_slot *
 
 	map = slotmap_by_bank(maps, bank);
 	if (map) {
-		fprintf(stderr, "BANKD %u:%u already in use, cannot add new map\n",
+		LOGP(DSLOTMAP, LOGL_ERROR, "BANKD %u:%u already in use, cannot add new map\n",
 			bank->bank_id, bank->slot_nr);
 		return NULL;
 	}
 
 	map = slotmap_by_client(maps, client);
 	if (map) {
-		fprintf(stderr, "CLIENT %u:%u already in use, cannot add new map\n",
+		LOGP(DSLOTMAP, LOGL_ERROR, "CLIENT %u:%u already in use, cannot add new map\n",
 			client->client_id, client->slot_nr);
 		return NULL;
 	}
@@ -132,7 +132,7 @@ struct slot_mapping *slotmap_add(struct slotmaps *maps, const struct bank_slot *
 #endif
 	slotmaps_unlock(maps);
 
-	printf("Slot Map %s added\n", slotmap_name(mapname, sizeof(mapname), map));
+	LOGP(DSLOTMAP, LOGL_INFO, "Slot Map %s added\n", slotmap_name(mapname, sizeof(mapname), map));
 
 	return map;
 }
@@ -142,7 +142,7 @@ void _slotmap_del(struct slotmaps *maps, struct slot_mapping *map)
 {
 	char mapname[64];
 
-	printf("Slot Map %s deleted\n", slotmap_name(mapname, sizeof(mapname), map));
+	LOGP(DSLOTMAP, LOGL_INFO, "Slot Map %s deleted\n", slotmap_name(mapname, sizeof(mapname), map));
 
 	llist_del(&map->list);
 #ifdef REMSIM_SERVER