[Minor] Added coroutines and async events support to rspamadm commands

3 files changed, 182 insertions, 86 deletions

diff --git a/src/rspamadm/lua_repl.c b/src/rspamadm/lua_repl.c
index 26b642871..39fa07480 100644
--- a/src/rspamadm/lua_repl.c
+++ b/src/rspamadm/lua_repl.c
@@ -20,6 +20,7 @@
 #include "libutil/http_private.h"
 #include "printf.h"
 #include "lua/lua_common.h"
+#include "lua/lua_thread_pool.h"
 #include "message.h"
 #include "unix-std.h"
 #include "linenoise.h"
@@ -37,6 +38,7 @@ static gchar *serve = NULL;
 static gchar *exec_line = NULL;
 static gint batch = -1;
 static gboolean per_line = FALSE;
+extern struct rspamd_async_session *rspamadm_session;
 
 static const char *default_history_file = ".rspamd_repl.hist";
 
@@ -70,10 +72,23 @@ struct rspamadm_lua_dot_command {
 	rspamadm_lua_dot_handler handler;
 };
 
+struct lua_call_data {
+	gint top;
+	gint ret;
+	gpointer ud;
+};
+
 static void rspamadm_lua_help_handler (lua_State *L, gint argc, gchar **argv);
 static void rspamadm_lua_load_handler (lua_State *L, gint argc, gchar **argv);
 static void rspamadm_lua_exec_handler (lua_State *L, gint argc, gchar **argv);
 static void rspamadm_lua_message_handler (lua_State *L, gint argc, gchar **argv);
+static void lua_execute_and_wait (gint narg);
+
+static void lua_thread_error_cb (struct thread_entry *thread, int ret, const char *msg);
+static void lua_thread_finish_cb (struct thread_entry *thread, int ret);
+static gint lua_repl_thread_call (struct thread_entry *thread, gint narg,
+		gpointer ud, lua_thread_error_t error_func);
+
 
 static struct rspamadm_lua_dot_command cmds[] = {
 	{
@@ -172,16 +187,41 @@ rspamadm_lua_add_path (lua_State *L, const gchar *path)
 	g_string_free (new_path, TRUE);
 }
 
+
+static void
+lua_thread_finish_cb (struct thread_entry *thread, int ret)
+{
+	struct lua_call_data *cd = thread->cd;
+
+	cd->ret = ret;
+}
+
+static void
+lua_thread_error_cb (struct thread_entry *thread, int ret, const char *msg)
+{
+	struct lua_call_data *cd = thread->cd;
+
+	rspamd_fprintf (stderr, "call failed: %s\n", msg);
+
+	cd->ret = ret;
+}
+
+static void
+lua_thread_str_error_cb (struct thread_entry *thread, int ret, const char *msg)
+{
+	struct lua_call_data *cd = thread->cd;
+	const char *what = cd->ud;
+
+	rspamd_fprintf (stderr, "call to %s failed: %s\n", what, msg);
+
+	cd->ret = ret;
+}
+
 static gboolean
 rspamadm_lua_load_script (lua_State *L, const gchar *path)
 {
-	GString *tb;
-	gint err_idx = 0;
-
-	if (!per_line) {
-		lua_pushcfunction (L, &rspamd_lua_traceback);
-		err_idx = lua_gettop (L);
-	}
+	struct thread_entry *thread = lua_thread_pool_get_for_config (rspamd_main->cfg);
+	L = thread->lua_state;
 
 	if (luaL_loadfile (L, path) != 0) {
 		rspamd_fprintf (stderr, "cannot load script %s: %s\n",
@@ -192,12 +232,8 @@ rspamadm_lua_load_script (lua_State *L, const gchar *path)
 	}
 
 	if (!per_line) {
-		if (lua_pcall (L, 0, 0, err_idx) != 0) {
-			tb = lua_touserdata (L, -1);
-			rspamd_fprintf (stderr, "call to %s failed: %v", path, tb);
-			g_string_free (tb, TRUE);
-			lua_settop (L, 0);
 
+		if (lua_repl_thread_call (thread, 0, (void *)path, lua_thread_str_error_cb) != 0) {
 			return FALSE;
 		}
 
@@ -211,27 +247,29 @@ static void
 rspamadm_exec_input (lua_State *L, const gchar *input)
 {
 	GString *tb;
-	gint err_idx, i, cbref;
+	gint i, cbref;
+	int top = 0;
 	gchar outbuf[8192];
 
-	lua_pushcfunction (L, &rspamd_lua_traceback);
-	err_idx = lua_gettop (L);
+	struct thread_entry *thread = lua_thread_pool_get_for_config (rspamd_main->cfg);
+	L = thread->lua_state;
 
 	/* First try return + input */
 	tb = g_string_sized_new (strlen (input) + sizeof ("return "));
 	rspamd_printf_gstring (tb, "return %s", input);
 
-	if (luaL_loadstring (L, tb->str) != 0) {
+	int r = luaL_loadstring (L, tb->str);
+	if (r != 0) {
 		/* Reset stack */
 		lua_settop (L, 0);
-		lua_pushcfunction (L, &rspamd_lua_traceback);
-		err_idx = lua_gettop (L);
 		/* Try with no return */
 		if (luaL_loadstring (L, input) != 0) {
 			rspamd_fprintf (stderr, "cannot load string %s\n",
 					input);
 			g_string_free (tb, TRUE);
 			lua_settop (L, 0);
+
+			lua_thread_pool_return (rspamd_main->cfg->lua_thread_pool, thread);
 			return;
 		}
 	}
@@ -239,31 +277,63 @@ rspamadm_exec_input (lua_State *L, const gchar *input)
 	g_string_free (tb, TRUE);
 
 	if (!per_line) {
-		if (lua_pcall (L, 0, LUA_MULTRET, err_idx) != 0) {
-			tb = lua_touserdata (L, -1);
-			rspamd_fprintf (stderr, "call failed: %v\n", tb);
-			g_string_free (tb, TRUE);
-			lua_settop (L, 0);
-			return;
-		}
 
-		/* Print output */
-		for (i = err_idx + 1; i <= lua_gettop (L); i++) {
-			if (lua_isfunction (L, i)) {
-				lua_pushvalue (L, i);
-				cbref = luaL_ref (L, LUA_REGISTRYINDEX);
+		top = lua_gettop (L);
+
+		if (lua_repl_thread_call (thread, 0, NULL, NULL) == 0) {
+			/* Print output */
+			for (i = top; i <= lua_gettop (L); i++) {
+				if (lua_isfunction (L, i)) {
+					lua_pushvalue (L, i);
+					cbref = luaL_ref (L, LUA_REGISTRYINDEX);
 
-				rspamd_printf ("local function: %d\n", cbref);
-			} else {
-				lua_logger_out_type (L, i, outbuf, sizeof (outbuf));
-				rspamd_printf ("%s\n", outbuf);
+					rspamd_printf ("local function: %d\n", cbref);
+				} else {
+					lua_logger_out_type (L, i, outbuf, sizeof (outbuf));
+					rspamd_printf ("%s\n", outbuf);
+				}
 			}
 		}
+	}
+}
 
-		lua_settop (L, 0);
+void
+wait_session_events ()
+{
+	/* XXX: it's probably worth to add timeout here - not to wait forever */
+	while (rspamd_session_events_pending (rspamadm_session) > 0) {
+		event_base_loop (rspamd_main->ev_base, EVLOOP_ONCE);
 	}
 }
 
+static gint
+lua_repl_thread_call (struct thread_entry *thread, gint narg, gpointer ud, lua_thread_error_t error_func)
+{
+	int ret;
+	struct lua_call_data *cd = g_new0 (struct lua_call_data, 1);
+	cd->top = lua_gettop (L);
+	cd->ud = ud;
+
+	thread->finish_callback = lua_thread_finish_cb;
+	if (error_func) {
+		thread->error_callback = error_func;
+	}
+	else {
+		thread->error_callback = lua_thread_error_cb;
+	}
+	thread->cd = cd;
+
+	lua_thread_call (thread, narg);
+
+	wait_session_events ();
+
+	ret = cd->ret;
+
+	g_free (cd);
+
+	return ret;
+}
+
 static void
 rspamadm_lua_help_handler (lua_State *L, gint argc, gchar **argv)
 {
@@ -308,12 +378,12 @@ rspamadm_lua_load_handler (lua_State *L, gint argc, gchar **argv)
 static void
 rspamadm_lua_exec_handler (lua_State *L, gint argc, gchar **argv)
 {
-	GString *tb;
-	gint err_idx, i;
+	gint i;
+
+	struct thread_entry *thread = lua_thread_pool_get_for_config (rspamd_main->cfg);
+	L = thread->lua_state;
 
 	for (i = 1; argv[i] != NULL; i ++) {
-		lua_pushcfunction (L, &rspamd_lua_traceback);
-		err_idx = lua_gettop (L);
 
 		if (luaL_loadfile (L, argv[i]) != 0) {
 			rspamd_fprintf (stderr, "cannot load script %s: %s\n",
@@ -323,16 +393,7 @@ rspamadm_lua_exec_handler (lua_State *L, gint argc, gchar **argv)
 			return;
 		}
 
-		if (lua_pcall (L, 0, 0, err_idx) != 0) {
-			tb = lua_touserdata (L, -1);
-			rspamd_fprintf (stderr, "call to %s failed: %v", argv[i], tb);
-			g_string_free (tb, TRUE);
-			lua_settop (L, 0);
-
-			return;
-		}
-
-		lua_settop (L, 0);
+		lua_repl_thread_call (thread, 0, argv[i], lua_thread_str_error_cb);
 	}
 }
 
@@ -340,11 +401,10 @@ static void
 rspamadm_lua_message_handler (lua_State *L, gint argc, gchar **argv)
 {
 	gulong cbref;
-	gint err_idx, func_idx, i, j;
+	gint old_top, func_idx, i, j;
 	struct rspamd_task *task, **ptask;
 	gpointer map;
 	gsize len;
-	GString *tb;
 	gchar outbuf[8192];
 
 	if (argv[1] == NULL) {
@@ -352,22 +412,26 @@ rspamadm_lua_message_handler (lua_State *L, gint argc, gchar **argv)
 		return;
 	}
 
-	if (rspamd_strtoul (argv[1], strlen (argv[1]), &cbref)) {
-		lua_rawgeti (L, LUA_REGISTRYINDEX, cbref);
-	}
-	else {
-		lua_getglobal (L, argv[1]);
-	}
+	for (i = 2; argv[i] != NULL; i ++) {
+		struct thread_entry *thread = lua_thread_pool_get_for_config (rspamd_main->cfg);
+		L = thread->lua_state;
 
-	if (lua_type (L, -1) != LUA_TFUNCTION) {
-		rspamd_printf ("bad callback type: %s\n", lua_typename (L, lua_type (L, -1)));
-		return;
-	}
+		if (rspamd_strtoul (argv[1], strlen (argv[1]), &cbref)) {
+			lua_rawgeti (L, LUA_REGISTRYINDEX, cbref);
+		}
+		else {
+			lua_getglobal (L, argv[1]);
+		}
 
-	/* Save index to reuse */
-	func_idx = lua_gettop (L);
+		if (lua_type (L, -1) != LUA_TFUNCTION) {
+			rspamd_printf ("bad callback type: %s\n", lua_typename (L, lua_type (L, -1)));
+			lua_thread_pool_return (rspamd_main->cfg->lua_thread_pool, thread);
+			return;
+		}
+
+		/* Save index to reuse */
+		func_idx = lua_gettop (L);
 
-	for (i = 2; argv[i] != NULL; i ++) {
 		map = rspamd_file_xmap (argv[i], PROT_READ, &len, TRUE);
 
 		if (map == NULL) {
@@ -391,23 +455,18 @@ rspamadm_lua_message_handler (lua_State *L, gint argc, gchar **argv)
 			}
 
 			rspamd_message_process (task);
-			lua_pushcfunction (L, &rspamd_lua_traceback);
-			err_idx = lua_gettop (L);
+			old_top = lua_gettop (L);
 
 			lua_pushvalue (L, func_idx);
 			ptask = lua_newuserdata (L, sizeof (*ptask));
 			*ptask = task;
 			rspamd_lua_setclass (L, "rspamd{task}", -1);
 
-			if (lua_pcall (L, 1, LUA_MULTRET, err_idx) != 0) {
-				tb = lua_touserdata (L, -1);
-				rspamd_printf ("lua callback for %s failed: %v\n", argv[i], tb);
-				g_string_free (tb, TRUE);
-			}
-			else {
+
+			if (lua_repl_thread_call (thread, 1, argv[i], lua_thread_str_error_cb) == 0) {
 				rspamd_printf ("lua callback for %s returned:\n", argv[i]);
 
-				for (j = err_idx + 1; j <= lua_gettop (L); j ++) {
+				for (j = old_top + 1; j <= lua_gettop (L); j ++) {
 					lua_logger_out_type (L, j, outbuf, sizeof (outbuf));
 					rspamd_printf ("%s\n", outbuf);
 				}
@@ -578,6 +637,18 @@ rspamadm_lua_finish_handler (struct rspamd_http_connection_entry *conn_ent)
 	g_free (session);
 }
 
+static void
+lua_thread_http_error_cb (struct thread_entry *thread, int ret, const char *msg)
+{
+	struct lua_call_data *cd = thread->cd;
+	struct rspamd_http_connection_entry *conn_ent = cd->ud;
+
+	rspamd_controller_send_error (conn_ent, 500, "call failed: %s\n", msg);
+
+	cd->ret = ret;
+}
+
+
 /*
  * Exec command handler:
  * request: /exec
@@ -598,7 +669,10 @@ rspamadm_lua_handle_exec (struct rspamd_http_connection_entry *conn_ent,
 	gsize body_len;
 
 	ctx = session->ctx;
-	L = ctx->L;
+
+	struct thread_entry *thread = lua_thread_pool_get_for_config (rspamd_main->cfg);
+	L = thread->lua_state;
+
 	body = rspamd_http_message_get_body (msg, &body_len);
 
 	if (body == NULL) {
@@ -629,12 +703,7 @@ rspamadm_lua_handle_exec (struct rspamd_http_connection_entry *conn_ent,
 
 	g_string_free (tb, TRUE);
 
-	if (lua_pcall (L, 0, LUA_MULTRET, err_idx) != 0) {
-		tb = lua_touserdata (L, -1);
-		rspamd_controller_send_error (conn_ent, 500, "call failed: %v\n", tb);
-		g_string_free (tb, TRUE);
-		lua_settop (L, 0);
-
+	if (lua_repl_thread_call (thread, 0, conn_ent, lua_thread_http_error_cb) != 0) {
 		return 0;
 	}
 
@@ -830,12 +899,10 @@ again:
 			lua_pushlstring (L, buf->str, MIN (buf->len, end_pos));
 			lua_setglobal (L, "input");
 
-			if (lua_pcall (L, 0, 0, 0) != 0) {
-				rspamd_fprintf (stderr, "call to script failed: %s",
-						lua_tostring (L, -1));
-				lua_settop (L, 0);
-				break;
-			}
+			struct thread_entry *thread = lua_thread_pool_get_for_config (rspamd_main->cfg);
+			L = thread->lua_state;
+
+			lua_repl_thread_call (thread, 0, NULL, NULL);
 
 			lua_settop (L, old_top);
 		}
diff --git a/src/rspamadm/rspamadm.c b/src/rspamadm/rspamadm.c
index d5a656a51..092e4ff58 100644
--- a/src/rspamadm/rspamadm.c
+++ b/src/rspamadm/rspamadm.c
@@ -31,6 +31,7 @@ static gboolean show_help = FALSE;
 static gboolean show_version = FALSE;
 GHashTable *ucl_vars = NULL;
 struct rspamd_main *rspamd_main = NULL;
+struct rspamd_async_session *rspamadm_session = NULL;
 lua_State *L = NULL;
 
 /* Defined in modules.c */
@@ -317,6 +318,28 @@ rspamadm_command_maybe_match_name (const gchar *cmd, const gchar *input)
 	return FALSE;
 }
 
+
+
+static void
+rspamadm_add_lua_globals()
+{
+	struct rspamd_async_session  **psession;
+	struct event_base **pev_base;
+
+	rspamadm_session = rspamd_session_create (rspamd_main->cfg->cfg_pool, NULL,
+			NULL, (event_finalizer_t )NULL, NULL);
+
+	psession = lua_newuserdata (L, sizeof (struct rspamd_async_session*));
+	rspamd_lua_setclass (L, "rspamd{session}", -1);
+	*psession = rspamadm_session;
+	lua_setglobal (L, "rspamadm_session");
+
+	pev_base = lua_newuserdata (L, sizeof (struct event_base *));
+	rspamd_lua_setclass (L, "rspamd{ev_base}", -1);
+	*pev_base = rspamd_main->ev_base;
+	lua_setglobal (L, "rspamadm_ev_base");
+}
+
 gint
 main (gint argc, gchar **argv, gchar **env)
 {
@@ -343,6 +366,8 @@ main (gint argc, gchar **argv, gchar **env)
 	rspamd_main->type = process_quark;
 	rspamd_main->server_pool = rspamd_mempool_new (rspamd_mempool_suggest_size (),
 			"rspamadm");
+	rspamd_main->ev_base = event_init ();
+
 	rspamadm_fill_internal_commands (all_commands);
 	help_command.command_data = all_commands;
 
@@ -417,6 +442,7 @@ main (gint argc, gchar **argv, gchar **env)
 	L = cfg->lua_state;
 	rspamd_lua_set_path (L, NULL, ucl_vars);
 	rspamd_lua_set_globals (cfg, L, ucl_vars);
+	rspamadm_add_lua_globals();
 
 	/* Init rspamadm global */
 	lua_newtable (L);
@@ -498,6 +524,8 @@ main (gint argc, gchar **argv, gchar **env)
 		cmd->run (0, NULL, cmd);
 	}
 
+	event_base_loopexit (rspamd_main->ev_base, NULL);
+
 	REF_RELEASE (rspamd_main->cfg);
 	rspamd_log_close (rspamd_main->logger, TRUE);
 	g_free (rspamd_main);
diff --git a/src/rspamadm/rspamadm.h b/src/rspamadm/rspamadm.h
index 02ecb2f47..ff1284942 100644
--- a/src/rspamadm/rspamadm.h
+++ b/src/rspamadm/rspamadm.h
@@ -24,6 +24,7 @@
 
 extern GHashTable *ucl_vars;
 extern lua_State *L;
+extern struct rspamd_main *rspamd_main;
 
 GQuark rspamadm_error (void);