From 062c88e486b4b1a09d7dd416c07a2678b4dd7b21 Mon Sep 17 00:00:00 2001
From: Florian Forster <octo@leeloo.lan.home.verplant.org>
Date: Sat, 10 Nov 2007 16:09:03 +0100
Subject: [PATCH] csv plugin: Add the possibility to store rates of counter
 DSes.

---
 src/collectd.conf.in  |  1 +
 src/collectd.conf.pod |  6 +++++
 src/csv.c             | 52 +++++++++++++++++++++++++++++++++++++++----
 3 files changed, 55 insertions(+), 4 deletions(-)

diff --git a/src/collectd.conf.in b/src/collectd.conf.in
index 58de5258..60046c05 100644
--- a/src/collectd.conf.in
+++ b/src/collectd.conf.in
@@ -74,6 +74,7 @@
 
 #<Plugin csv>
 #	DataDir "@prefix@/var/lib/@PACKAGE_NAME@/csv"
+#	StoreRates false
 #</Plugin>
 
 #<Plugin df>
diff --git a/src/collectd.conf.pod b/src/collectd.conf.pod
index b1fcc91a..004a6661 100644
--- a/src/collectd.conf.pod
+++ b/src/collectd.conf.pod
@@ -175,6 +175,12 @@ installed and an "cpu governor" (that's a kernel module) is loaded.
 Set the directory to store CSV-files under. Per default CSV-files are generated
 beneath the daemon's working directory, i.E<nbsp>e. the B<BaseDir>.
 
+=item B<StoreRates> B<true|false>
+
+If set to B<true>, convert counter values to rates. If set to B<false> (the
+default) counter values are stored as is, i.E<nbsp>e. as an increasing integer
+number.
+
 =back
 
 =head2 Plugin C<df>
diff --git a/src/csv.c b/src/csv.c
index 192cf52e..ff59f91c 100644
--- a/src/csv.c
+++ b/src/csv.c
@@ -22,17 +22,20 @@
 #include "collectd.h"
 #include "plugin.h"
 #include "common.h"
+#include "utils_cache.h"
 
 /*
  * Private variables
  */
 static const char *config_keys[] =
 {
-	"DataDir"
+	"DataDir",
+	"StoreRates"
 };
 static int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
 
 static char *datadir   = NULL;
+static int store_rates = 0;
 
 static int value_list_to_string (char *buffer, int buffer_len,
 		const data_set_t *ds, const value_list_t *vl)
@@ -40,6 +43,7 @@ static int value_list_to_string (char *buffer, int buffer_len,
 	int offset;
 	int status;
 	int i;
+	gauge_t *rates = NULL;
 
 	memset (buffer, '\0', buffer_len);
 
@@ -55,18 +59,45 @@ static int value_list_to_string (char *buffer, int buffer_len,
 			return (-1);
 
 		if (ds->ds[i].type == DS_TYPE_COUNTER)
-			status = snprintf (buffer + offset, buffer_len - offset,
-					",%llu", vl->values[i].counter);
-		else
+		{
+			if (store_rates == 0)
+			{
+				status = snprintf (buffer + offset,
+						buffer_len - offset,
+						",%llu",
+						vl->values[i].counter);
+			}
+			else /* if (store_rates == 1) */
+			{
+				if (rates == NULL)
+					rates = uc_get_rate (ds, vl);
+				if (rates == NULL)
+				{
+					WARNING ("csv plugin: "
+							"uc_get_rate failed.");
+					return (-1);
+				}
+				status = snprintf (buffer + offset,
+						buffer_len - offset,
+						",%lf", rates[i]);
+			}
+		}
+		else /* if (ds->ds[i].type == DS_TYPE_GAUGE) */
+		{
 			status = snprintf (buffer + offset, buffer_len - offset,
 					",%lf", vl->values[i].gauge);
+		}
 
 		if ((status < 1) || (status >= (buffer_len - offset)))
+		{
+			sfree (rates);
 			return (-1);
+		}
 
 		offset += status;
 	} /* for ds->ds_num */
 
+	sfree (rates);
 	return (0);
 } /* int value_list_to_string */
 
@@ -181,6 +212,19 @@ static int csv_config (const char *key, const char *value)
 			}
 		}
 	}
+	else if (strcasecmp ("StoreRates", key) == 0)
+	{
+		if ((strcasecmp ("True", value) == 0)
+				|| (strcasecmp ("Yes", value) == 0)
+				|| (strcasecmp ("On", value) == 0))
+		{
+			store_rates = 1;
+		}
+		else
+		{
+			store_rates = 0;
+		}
+	}
 	else
 	{
 		return (-1);
-- 
2.30.2