1 files changed, 81 insertions, 0 deletions
diff --git a/daemon/bindings/worker.c b/daemon/bindings/worker.c
new file mode 100644
index 0000000..d985000
--- /dev/null
+++ b/daemon/bindings/worker.c
@@ -0,0 +1,81 @@
+/*  Copyright (C) CZ.NIC, z.s.p.o. <knot-resolver@labs.nic.cz>
+ *  SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#include "daemon/bindings/impl.h"
+
+
+static inline double getseconds(uv_timeval_t *tv)
+{
+	return (double)tv->tv_sec + 0.000001*((double)tv->tv_usec);
+}
+
+/** Return worker statistics. */
+static int wrk_stats(lua_State *L)
+{
+	struct worker_ctx *worker = the_worker;
+	if (!worker) {
+		return 0;
+	}
+	lua_newtable(L);
+	lua_pushnumber(L, worker->stats.queries);
+	lua_setfield(L, -2, "queries");
+	lua_pushnumber(L, worker->stats.concurrent);
+	lua_setfield(L, -2, "concurrent");
+	lua_pushnumber(L, worker->stats.dropped);
+	lua_setfield(L, -2, "dropped");
+
+	lua_pushnumber(L, worker->stats.timeout);
+	lua_setfield(L, -2, "timeout");
+	lua_pushnumber(L, worker->stats.udp);
+	lua_setfield(L, -2, "udp");
+	lua_pushnumber(L, worker->stats.tcp);
+	lua_setfield(L, -2, "tcp");
+	lua_pushnumber(L, worker->stats.tls);
+	lua_setfield(L, -2, "tls");
+	lua_pushnumber(L, worker->stats.ipv4);
+	lua_setfield(L, -2, "ipv4");
+	lua_pushnumber(L, worker->stats.ipv6);
+	lua_setfield(L, -2, "ipv6");
+	lua_pushnumber(L, worker->stats.err_udp);
+	lua_setfield(L, -2, "err_udp");
+	lua_pushnumber(L, worker->stats.err_tcp);
+	lua_setfield(L, -2, "err_tcp");
+	lua_pushnumber(L, worker->stats.err_tls);
+	lua_setfield(L, -2, "err_tls");
+	lua_pushnumber(L, worker->stats.err_http);
+	lua_setfield(L, -2, "err_http");
+
+	/* Add subset of rusage that represents counters. */
+	uv_rusage_t rusage;
+	if (uv_getrusage(&rusage) == 0) {
+		lua_pushnumber(L, getseconds(&rusage.ru_utime));
+		lua_setfield(L, -2, "usertime");
+		lua_pushnumber(L, getseconds(&rusage.ru_stime));
+		lua_setfield(L, -2, "systime");
+		lua_pushnumber(L, rusage.ru_majflt);
+		lua_setfield(L, -2, "pagefaults");
+		lua_pushnumber(L, rusage.ru_nswap);
+		lua_setfield(L, -2, "swaps");
+		lua_pushnumber(L, rusage.ru_nvcsw + rusage.ru_nivcsw);
+		lua_setfield(L, -2, "csw");
+	}
+	/* Get RSS */
+	size_t rss = 0;
+	if (uv_resident_set_memory(&rss) == 0) {
+		lua_pushnumber(L, rss);
+		lua_setfield(L, -2, "rss");
+	}
+	return 1;
+}
+
+int kr_bindings_worker(lua_State *L)
+{
+	static const luaL_Reg lib[] = {
+		{ "stats",    wrk_stats },
+		{ NULL, NULL }
+	};
+	luaL_register(L, "worker", lib);
+	return 1;
+}
+