v5upgrade target: This new target can be used to fix some "legacy" identifiers …

… on the fly. Just put it into the pre-cache chain to fix up some of the
most common changes from 4.* to 5.*. This hopefully makes migration
easier.

diff --git a/configure.in b/configure.in
index c435027..88ff302 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -4342,6 +4342,7 @@ AC_PLUGIN([target_notification], [yes],        [The notification target])
 AC_PLUGIN([target_replace], [yes],             [The replace target])
 AC_PLUGIN([target_scale],[yes],                [The scale target])
 AC_PLUGIN([target_set],  [yes],                [The set target])
+AC_PLUGIN([target_v5upgrade], [yes],           [The v5upgrade target])
 AC_PLUGIN([tcpconns],    [$plugin_tcpconns],   [TCP connection statistics])
 AC_PLUGIN([teamspeak2],  [yes],                [TeamSpeak2 server statistics])
 AC_PLUGIN([ted],         [$plugin_ted],        [Read The Energy Detective values])
@@ -4658,6 +4659,7 @@ Configuration:
     target_replace  . . . $enable_target_replace
     target_scale  . . . . $enable_target_scale
     target_set  . . . . . $enable_target_set
+    target_v5upgrade  . . $enable_target_v5upgrade
     tcpconns  . . . . . . $enable_tcpconns
     teamspeak2  . . . . . $enable_teamspeak2
     ted . . . . . . . . . $enable_ted

diff --git a/src/Makefile.am b/src/Makefile.am
index 5290ab3..d4aaac7 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1036,6 +1036,14 @@ collectd_LDADD += "-dlopen" target_set.la
 collectd_DEPENDENCIES += target_set.la
 endif
 
+if BUILD_PLUGIN_TARGET_V5UPGRADE
+pkglib_LTLIBRARIES += target_v5upgrade.la
+target_v5upgrade_la_SOURCES = target_v5upgrade.c
+target_v5upgrade_la_LDFLAGS = -module -avoid-version
+collectd_LDADD += "-dlopen" target_v5upgrade.la
+collectd_DEPENDENCIES += target_v5upgrade.la
+endif
+
 if BUILD_PLUGIN_TCPCONNS
 pkglib_LTLIBRARIES += tcpconns.la
 tcpconns_la_SOURCES = tcpconns.c

diff --git a/src/target_v5upgrade.c b/src/target_v5upgrade.c
new file mode 100644 (file)
index 0000000..9ae84b9
--- /dev/null
+++ b/src/target_v5upgrade.c
@@ -0,0 +1,91 @@
+/**
+ * collectd - src/target_set.c
+ * Copyright (C) 2008-2010  Florian Forster
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; only version 2.1 of the License is
+ * applicable.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * Authors:
+ *   Florian Forster <octo at verplant.org>
+ **/
+
+#include "collectd.h"
+#include "plugin.h"
+#include "common.h"
+#include "filter_chain.h"
+
+static void v5_swap_instances (value_list_t *vl) /* {{{ */
+{
+  char tmp[DATA_MAX_NAME_LEN];
+
+  assert (sizeof (tmp) == sizeof (vl->plugin_instance));
+  assert (sizeof (tmp) == sizeof (vl->type_instance));
+
+  memcpy (tmp, vl->plugin_instance, sizeof (tmp));
+  memcpy (vl->plugin_instance, vl->type_instance, sizeof (tmp));
+  memcpy (vl->type_instance, tmp, sizeof (tmp));
+} /* }}} void v5_swap_instances */
+
+/*
+ * Interface plugin
+ *
+ * 4.* stores the interface in the type instance and leaves the plugin
+ * instance empty. If this is the case, put the interface name into the plugin
+ * instance and clear the type instance.
+ */
+static int v5_interface (const data_set_t *ds, value_list_t *vl) /* {{{ */
+{
+  if ((vl->plugin_instance[0] != 0) || (vl->type_instance[0] == 0))
+    return (FC_TARGET_CONTINUE);
+
+  v5_swap_instances (vl);
+  return (FC_TARGET_CONTINUE);
+} /* }}} int v5_interface */
+
+static int v5_destroy (void **user_data) /* {{{ */
+{
+  return (0);
+} /* }}} int v5_destroy */
+
+static int v5_create (const oconfig_item_t *ci, void **user_data) /* {{{ */
+{
+  *user_data = NULL;
+  return (0);
+} /* }}} int v5_create */
+
+static int v5_invoke (const data_set_t *ds, value_list_t *vl, /* {{{ */
+    notification_meta_t __attribute__((unused)) **meta, void **user_data)
+{
+  if ((ds == NULL) || (vl == NULL) || (user_data == NULL))
+    return (-EINVAL);
+
+  if (strcmp ("interface", vl->plugin) == 0)
+    return (v5_interface (ds, vl));
+
+  return (FC_TARGET_CONTINUE);
+} /* }}} int v5_invoke */
+
+void module_register (void)
+{
+       target_proc_t tproc;
+
+       memset (&tproc, 0, sizeof (tproc));
+       tproc.create  = v5_create;
+       tproc.destroy = v5_destroy;
+       tproc.invoke  = v5_invoke;
+       fc_register_target ("v5upgrade", tproc);
+} /* module_register */
+
+/* vim: set sw=2 sts=2 tw=78 et fdm=marker : */
+