Addition of the module info structure to allow module information to

be extracted from the modules.

This gives a way to verify the API that the module provides as well
as the version of that API. The hope is that this will make it possible
for MaxScale to detect out of date plugins and either adapt to use them
or reject loading them.

Also added the ability to set a release state on a per module basis.
This allows for production ready and non-production ready plugins to
be identified.

server/modules/monitor/galera_mon.c

@@ -44,6 +44,7 @@
 #include <log_manager.h>
 #include <secrets.h>
 #include <dcb.h>
+#include <modinfo.h>
 
 extern int lm_enabled_logfiles_bitmask;
 
@@ -51,6 +52,13 @@ static	void	monitorMain(void *);
 
 static char *version_str = "V1.2.0";
 
+MODULE_INFO	info = {
+	MODULE_API_MONITOR,
+	MODULE_ALPHA_RELEASE,
+	MONITOR_VERSION,
+	"A Galera cluster monitor"
+};
+
 static	void 	*startMonitor(void *);
 static	void	stopMonitor(void *);
 static	void	registerServer(void *, SERVER *);

server/modules/monitor/mysql_mon.c

@@ -48,6 +48,7 @@
 #include <log_manager.h>
 #include <secrets.h>
 #include <dcb.h>
+#include <modinfo.h>
 
 extern int lm_enabled_logfiles_bitmask;
 
@@ -55,6 +56,13 @@ static	void	monitorMain(void *);
 
 static char *version_str = "V1.2.0";
 
+MODULE_INFO	info = {
+	MODULE_API_MONITOR,
+	MODULE_ALPHA_RELEASE,
+	MONITOR_VERSION,
+	"A MySQL Master/Slave replication monitor"
+};
+
 static	void 	*startMonitor(void *);
 static	void	stopMonitor(void *);
 static	void	registerServer(void *, SERVER *);

server/modules/protocol/httpd.c

@@ -39,6 +39,14 @@
 
 #include <httpd.h>
 #include <gw.h>
+#include <modinfo.h>
+
+MODULE_INFO info = {
+	MODULE_API_PROTOCOL,
+	MODULE_IN_DEVELOPMENT,
+	GWPROTOCOL_VERSION,
+	"An experimental HTTPD implementation for use in admnistration"
+};
 
 #define ISspace(x) isspace((int)(x))
 #define HTTP_SERVER_STRING "Gateway(c) v.1.0.0"

server/modules/protocol/mysql_backend.c

@@ -43,6 +43,14 @@
  * 27/09/2013	Massimiliano Pinto	Changed in gw_read_backend_event the check for dcb_read(), now is if rc < 0
  *
  */
+#include <modinfo.h>
+
+MODULE_INFO info = {
+	MODULE_API_PROTOCOL,
+	MODULE_ALPHA_RELEASE,
+	GWPROTOCOL_VERSION,
+	"The MySQL to backend server protocol"
+};
 
 extern int lm_enabled_logfiles_bitmask;
 

server/modules/protocol/mysql_client.c

@@ -40,6 +40,14 @@
 #include <log_manager.h>
 #include <mysql_client_server_protocol.h>
 #include <gw.h>
+#include <modinfo.h>
+
+MODULE_INFO info = {
+	MODULE_API_PROTOCOL,
+	MODULE_ALPHA_RELEASE,
+	GWPROTOCOL_VERSION,
+	"The client to MaxScale MySQL protocol implementation"
+};
 
 extern int lm_enabled_logfiles_bitmask;
 

server/modules/protocol/telnetd.c

@@ -36,6 +36,14 @@
 #include <adminusers.h>
 #include <skygw_utils.h>
 #include <log_manager.h>
+#include <modinfo.h>
+
+MODULE_INFO info = {
+	MODULE_API_PROTOCOL,
+	MODULE_ALPHA_RELEASE,
+	GWPROTOCOL_VERSION,
+	"A telnet deamon protocol for simple administration interface"
+};
 
 extern int lm_enabled_logfiles_bitmask;
 

server/modules/routing/debugcli.c

@@ -35,6 +35,7 @@
 #include <session.h>
 #include <router.h>
 #include <modules.h>
+#include <modinfo.h>
 #include <atomic.h>
 #include <spinlock.h>
 #include <dcb.h>
@@ -43,6 +44,14 @@
 #include <skygw_utils.h>
 #include <log_manager.h>
 
+
+MODULE_INFO 	info = {
+	MODULE_API_ROUTER,
+	MODULE_ALPHA_RELEASE,
+	ROUTER_VERSION,
+	"The debug user interface"
+};
+
 extern int lm_enabled_logfiles_bitmask;
 
 static char *version_str = "V1.1.1";

server/modules/routing/readconnroute.c

@@ -79,6 +79,7 @@
 #include <readconnection.h>
 #include <dcb.h>
 #include <spinlock.h>
+#include <modinfo.h>
 
 #include <skygw_types.h>
 #include <skygw_utils.h>
@@ -88,6 +89,13 @@
 
 extern int lm_enabled_logfiles_bitmask;
 
+MODULE_INFO 	info = {
+	MODULE_API_ROUTER,
+	MODULE_ALPHA_RELEASE,
+	ROUTER_VERSION,
+	"A connection based router to load balance based on connections"
+};
+
 static char *version_str = "V1.0.2";
 
 /* The router entry points */

server/modules/routing/readwritesplit/readwritesplit.c

@@ -30,6 +30,15 @@
 #include <query_classifier.h>
 #include <dcb.h>
 #include <spinlock.h>
+#include <modinfo.h>
+
+MODULE_INFO 	info = {
+	MODULE_API_ROUTER,
+	MODULE_ALPHA_RELEASE,
+	ROUTER_VERSION,
+	"A Read/Write splitting router for enhancement read scalability"
+};
+
 
 extern int lm_enabled_logfiles_bitmask;
 
@@ -2450,4 +2459,4 @@ static void rwsplit_process_options(
                         }
                 }
         } /*< for */
-}
+}

server/modules/routing/testroute.c

@@ -17,9 +17,17 @@
  */
 #include <stdio.h>
 #include <router.h>
+#include <modinfo.h>
 
 static char *version_str = "V1.0.0";
 
+MODULE_INFO 	info = {
+	MODULE_API_ROUTER,
+	MODULE_IN_DEVELOPMENT,
+	ROUTER_VERSION,
+	"A test router - not for use in real systems"
+};
+
 static	ROUTER	*createInstance(SERVICE *service, char **options);
 static	void	*newSession(ROUTER *instance, SESSION *session);
 static	void 	closeSession(ROUTER *instance, void *session);
@@ -145,4 +153,4 @@ static uint8_t getCapabilities(
         void*    router_session)
 {
         return 0;
-}
+}