+/**
+ * Add this log to our list of active logs.
+ * We have one active log per "mount" - client instance or servername.
+ * Each instance may be at a different point in the log.
+ */
+static int config_log_add(struct obd_device *obd, char *logname,
+ struct config_llog_instance *cfg,
+ struct super_block *sb)
+{
+ struct config_llog_data *cld, *sptlrpc_cld;
+ char seclogname[20];
+ char *ptr;
+ ENTRY;
+
+ CDEBUG(D_MGC, "adding config log %s:%s\n", logname, cfg->cfg_instance);
+
+ /*
+ * for each regular log, the depended sptlrpc log name is
+ * <fsname>-sptlrpc. multiple regular logs may share one sptlrpc log.
+ */
+ ptr = strrchr(logname, '-');
+ if (ptr == NULL || ptr - logname > 8) {
+ CERROR("logname %s is too long\n", logname);
+ RETURN(-EINVAL);
+ }
+
+ memcpy(seclogname, logname, ptr - logname);
+ strcpy(seclogname + (ptr - logname), "-sptlrpc");
+
+ sptlrpc_cld = config_log_find(seclogname, NULL);
+ if (IS_ERR(sptlrpc_cld)) {
+ sptlrpc_cld = do_config_log_add(obd, seclogname, 1, NULL, NULL);
+ if (IS_ERR(sptlrpc_cld)) {
+ CERROR("can't create sptlrpc log: %s\n", seclogname);
+ RETURN(PTR_ERR(sptlrpc_cld));
+ }
+ }
+
+ cld = do_config_log_add(obd, logname, 0, cfg, sb);
+ if (IS_ERR(cld)) {
+ CERROR("can't create log: %s\n", logname);
+ config_log_put(sptlrpc_cld);
+ RETURN(PTR_ERR(cld));
+ }
+
+ cld->cld_sptlrpc = sptlrpc_cld;
+
+ RETURN(0);
+}
+
+CFS_DECLARE_MUTEX(llog_process_lock);
+