lib: Convert routemap.c to use new error-code subsystem

Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>

lib/lib_errors.c

@@ -46,6 +46,12 @@ static struct log_ref ferr_lib_warn[] = {
 		.description = "The Event subsystem has detected a slow process, this typically indicates that FRR is having trouble completing work in a timely manner.  This can be either a misconfiguration, bug, or some combination therof.",
 		.suggestion = "Gather log data and open an Issue",
 	},
+	{
+		.code = LIB_WARN_RMAP_RECURSION_LIMIT,
+		.title = "Reached the Route-Map Recursion Limit",
+		.description = "The Route-Map subsystem has detected a route-map depth of RMAP_RECURSION_LIMIT and has stopped processing",
+		.suggestion = "Re-work the Route-Map in question to not have so many route-map statements, or recompile FRR with a higher limit",
+	},
 	{
 		.code = END_FERR,
 	},

lib/lib_errors.h

@@ -42,6 +42,7 @@ enum lib_log_refs {
 	LIB_WARN_STREAM,
 	LIB_WARN_LINUX_NS,
 	LIB_WARN_SLOW_THREAD,
+	LIB_WARN_RMAP_RECURSION_LIMIT,
 };
 
 extern void lib_error_init(void);

lib/routemap.c

@@ -30,6 +30,7 @@
 #include "log.h"
 #include "hash.h"
 #include "libfrr.h"
+#include "lib_errors.h"
 
 DEFINE_MTYPE_STATIC(LIB, ROUTE_MAP, "Route map")
 DEFINE_MTYPE(LIB, ROUTE_MAP_NAME, "Route map name")
@@ -1445,7 +1446,8 @@ route_map_result_t route_map_apply(struct route_map *map,
 	struct route_map_rule *set;
 
 	if (recursion > RMAP_RECURSION_LIMIT) {
-		zlog_warn(
+		flog_warn(
+			LIB_WARN_RMAP_RECURSION_LIMIT,
 			"route-map recursion limit (%d) reached, discarding route",
 			RMAP_RECURSION_LIMIT);
 		recursion = 0;