[Feature] Allow to disable specific workers in the config

conf/dmarc_whitelist.inc

@@ -25,6 +25,7 @@ force.com
 hh.ru
 instagram.com
 linkedin.com
+livejournal.com
 mackeeper.com
 mercadolibre.com.ar
 mercadolivre.com.br

src/libserver/cfg_file.h

@@ -198,6 +198,7 @@ struct rspamd_worker_conf {
 	gpointer *ctx;                                  /**< worker's context									*/
 	ucl_object_t *options;                          /**< other worker's options								*/
 	struct rspamd_worker_lua_script *scripts;       /**< registered lua scripts								*/
+	gboolean enabled;
 	ref_entry_t ref;
 };
 

src/libserver/cfg_rcl.c

@@ -2400,6 +2400,12 @@ rspamd_rcl_config_init (struct rspamd_config *cfg)
 			G_STRUCT_OFFSET (struct rspamd_worker_conf, rlimit_maxcore),
 			RSPAMD_CL_FLAG_INT_32,
 			"Max size of core file in bytes");
+	rspamd_rcl_add_default_handler (sub,
+			"enabled",
+			rspamd_rcl_parse_struct_boolean,
+			G_STRUCT_OFFSET (struct rspamd_worker_conf, enabled),
+			0,
+			"Enable or disable a worker (true by default)");
 
 	/**
 	 * Modules handler

src/libserver/cfg_utils.c

@@ -987,6 +987,7 @@ rspamd_config_new_worker (struct rspamd_config *cfg,
 #endif
 		c->rlimit_nofile = 0;
 		c->rlimit_maxcore = 0;
+		c->enabled = TRUE;
 
 		REF_INIT_RETAIN (c, rspamd_worker_conf_dtor);
 		rspamd_mempool_add_destructor (cfg->cfg_pool,

src/rspamd.c

@@ -550,6 +550,14 @@ spawn_workers (struct rspamd_main *rspamd_main, struct event_base *ev_base)
 			msg_err_main ("type of worker is unspecified, skip spawning");
 		}
 		else {
+			if (!cf->enabled) {
+				msg_info_main ("worker of type %s is disabled in the config, "
+						"skip spawning", g_quark_to_string (cf->type));
+				cur = g_list_next (cur);
+
+				continue;
+			}
+
 			if (cf->worker->flags & RSPAMD_WORKER_ALWAYS_START) {
 				g_ptr_array_add (seen_mandatory_workers, cf->worker);
 			}