Rename FILTER_DEF to MXS_FILTER_DEF

Provide functions that allows the actual definition of MXS_FILTER_DEF
to be made private.

include/maxscale/filter.h

@@ -92,7 +92,7 @@ typedef struct mxs_filter_object
  * This is basically the link between a plugin to load and the
  * optons to pass to that plugin.
  */
-typedef struct filter_def
+typedef struct mxs_filter_def
 {
     char *name;                   /**< The Filter name */
     char *module;                 /**< The module to load */
@@ -101,13 +101,37 @@ typedef struct filter_def
     MXS_FILTER* filter;           /**< The runtime filter */
     MXS_FILTER_OBJECT *obj;       /**< The "MODULE_OBJECT" for the filter */
     SPINLOCK spin;                /**< Spinlock to protect the filter definition */
-    struct filter_def *next;      /**< Next filter in the chain of all filters */
-} FILTER_DEF;
+    struct mxs_filter_def *next;  /**< Next filter in the chain of all filters */
+} MXS_FILTER_DEF;
 
-FILTER_DEF *filter_find(const char *);
+/**
+ * Lookup a filter definition using the unique section name in
+ * the configuration file.
+ *
+ * @param name The name of a filter.
+ *
+ * @return A filter definition or NULL if not found.
+ */
+MXS_FILTER_DEF *filter_def_find(const char *name);
+
+/**
+ * Get module name of a filter definition.
+ *
+ * @param filter_def  A filter definition.
+ *
+ * @return The module name.
+ */
+const char* filter_def_get_module_name(const MXS_FILTER_DEF* filter_def);
+
+/**
+ * Get the filter instance of a particular filter definition.
+ *
+ * @return A filter instance.
+ */
+MXS_FILTER* filter_def_get_instance(const MXS_FILTER_DEF* filter_def);
 
 void dprintAllFilters(DCB *);
-void dprintFilter(DCB *, const FILTER_DEF *);
+void dprintFilter(DCB *, const MXS_FILTER_DEF *);
 void dListFilters(DCB *);
 
 /**

include/maxscale/modulecmd.h

@@ -83,14 +83,14 @@ struct arg_node
     modulecmd_arg_type_t  type;
     union
     {
-        char       *string;
-        bool        boolean;
-        SERVICE    *service;
-        SERVER     *server;
-        SESSION    *session;
-        DCB        *dcb;
-        MONITOR    *monitor;
-        FILTER_DEF *filter;
+        char            *string;
+        bool            boolean;
+        SERVICE        *service;
+        SERVER         *server;
+        SESSION        *session;
+        DCB            *dcb;
+        MONITOR        *monitor;
+        MXS_FILTER_DEF *filter;
     } value;
 };
 

include/maxscale/service.h

@@ -163,7 +163,7 @@ typedef struct service
                                         * when querying them from the server. MySQL Workbench seems
                                         * to escape at least the underscore character. */
     SERVICE_REFRESH_RATE rate_limit;   /**< The refresh rate limit for users table */
-    FILTER_DEF **filters;              /**< Ordered list of filters */
+    MXS_FILTER_DEF **filters;          /**< Ordered list of filters */
     int n_filters;                     /**< Number of filters */
     long conn_idle_timeout;            /**< Session timeout in seconds */
     char *weightby;                    /**< Service weighting parameter name */

include/maxscale/session.h

@@ -45,7 +45,7 @@ MXS_BEGIN_DECLS
 
 struct dcb;
 struct service;
-struct filter_def;
+struct mxs_filter_def;
 struct server;
 
 /**
@@ -132,7 +132,7 @@ typedef struct mxs_upstream
  */
 typedef struct
 {
-    struct filter_def *filter;
+    struct mxs_filter_def *filter;
     void *instance;
     void *session;
 } SESSION_FILTER;