From c26049e8d272a94190972677a81bc0a29c83aa00 Mon Sep 17 00:00:00 2001
From: Claudius Herder <claudius@ambtec.de>
Date: Wed, 19 Dec 2012 18:37:51 +0100
Subject: [PATCH] Update plugins/zfs/zfs_stats_

Don't divide by zero if there is no l2arc

Error output from zfs_stats_cachehitlist:
dc: divide by zero
---
 plugins/zfs/zfs_stats_ | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/plugins/zfs/zfs_stats_ b/plugins/zfs/zfs_stats_
index 40a4072b..7252dfe0 100755
--- a/plugins/zfs/zfs_stats_
+++ b/plugins/zfs/zfs_stats_
@@ -109,8 +109,10 @@ else
 fi
 
 L2_ACCESSES_TOTAL=`echo "$L2_HITS+$L2_MISSES" | $BC`
-L2_HIT_RATIO_PERC=`echo "scale=2 ; (100*$L2_HITS/$L2_ACCESSES_TOTAL)" | $BC`
-L2_MISS_RATIO_PERC=`echo "scale=2 ; (100*$L2_MISSES/$L2_ACCESSES_TOTAL)" | $BC`
+if [ $L2_ACCESSES_TOTAL -gt 0 ]; then
+	L2_HIT_RATIO_PERC=`echo "scale=2 ; (100*$L2_HITS/$L2_ACCESSES_TOTAL)" | $BC`
+	L2_MISS_RATIO_PERC=`echo "scale=2 ; (100*$L2_MISSES/$L2_ACCESSES_TOTAL)" | $BC`
+fi
 
 efficiency() {
         if [ "$1" = "config" ]; then