[Feature] Add common directory for hyperscan cache to config

conf/options.inc

@@ -35,3 +35,4 @@ words_decay = 200;
 
 # Local networks
 local_addrs = "192.168.0.0/16, 10.0.0.0/8, 172.16.0.0/12, fd00::/8, 169.254.0.0/16, fe80::/10";
+hs_cache_dir = "${DBDIR}/";

src/hs_helper.c

@@ -66,7 +66,7 @@ init_hs_helper (struct rspamd_config *cfg)
 
 	ctx->magic = rspamd_hs_helper_magic;
 	ctx->cfg = cfg;
-	ctx->hs_dir = RSPAMD_DBDIR "/";
+	ctx->hs_dir = NULL;
 	ctx->max_time = default_max_time;
 	ctx->recompile_time = default_recompile_time;
 
@@ -249,6 +249,14 @@ start_hs_helper (struct rspamd_worker *worker)
 	struct timeval tv;
 	double tim;
 
+
+	if (ctx->hs_dir == NULL) {
+		ctx->hs_dir = ctx->cfg->hs_cache_dir;
+	}
+	if (ctx->hs_dir == NULL) {
+		ctx->hs_dir = RSPAMD_DBDIR "/";
+	}
+
 	ctx->ev_base = rspamd_prepare_worker (worker,
 			"hs_helper",
 			NULL);

src/libserver/cfg_file.h

@@ -368,6 +368,8 @@ struct rspamd_config {
 
 	gchar * tld_file;                               /**< file to load effective tld list from				*/
 
+	gchar * hs_cache_dir;                           /**< directory to save hyperscan databases				*/
+
 	gdouble dns_timeout;                            /**< timeout in milliseconds for waiting for dns reply	*/
 	guint32 dns_retransmits;                        /**< maximum retransmits count							*/
 	guint32 dns_throttling_errors;                  /**< maximum errors for starting resolver throttling	*/

src/libserver/cfg_rcl.c

@@ -1779,6 +1779,12 @@ rspamd_rcl_config_init (struct rspamd_config *cfg)
 			G_STRUCT_OFFSET (struct rspamd_config, tld_file),
 			RSPAMD_CL_FLAG_STRING_PATH,
 			"Path to the TLD file for urls detector");
+	rspamd_rcl_add_default_handler (sub,
+			"hs_cache_dir",
+			rspamd_rcl_parse_struct_string,
+			G_STRUCT_OFFSET (struct rspamd_config, hs_cache_dir),
+			RSPAMD_CL_FLAG_STRING_PATH,
+			"Path directory where rspamd would save hyperscan cache");
 	rspamd_rcl_add_default_handler (sub,
 			"history_rows",
 			rspamd_rcl_parse_struct_integer,