+/**
+ * Send associated to 'req' a message described by 'fmt' and its 'args'
+ * to the journal for the verbosity 'level'.
+ *
+ * 'file', 'line' and 'func' are indicators of position of the code in source files
+ * (see macros __FILE__, __LINE__ and __func__).
+ *
+ * 'level' is defined by syslog standard:
+ * EMERGENCY 0 System is unusable
+ * ALERT 1 Action must be taken immediately
+ * CRITICAL 2 Critical conditions
+ * ERROR 3 Error conditions
+ * WARNING 4 Warning conditions
+ * NOTICE 5 Normal but significant condition
+ * INFO 6 Informational
+ * DEBUG 7 Debug-level messages
+ *
+ * @param req the request
+ * @param level the level of the message
+ * @param file the source filename that emits the message or NULL
+ * @param line the line number in the source filename that emits the message
+ * @param func the name of the function that emits the message or NULL
+ * @param fmt the message format as for printf
+ * @param args the arguments to the format 'fmt'
+ *
+ * @see printf
+ * @see afb_req_x2_verbose
+ */
+static inline
+void afb_req_x2_vverbose(
+ struct afb_req_x2 *req,
+ int level, const char *file,
+ int line,
+ const char * func,
+ const char *fmt,
+ va_list args)
+{
+ req->itf->vverbose(req, level, file, line, func, fmt, args);
+}
+