common/dmthin: Fix grep command for finding exact value

Sometimes there are multiple occurances of meta_name, pool_name,
data_name in dmsetup command which causes failures while adding in
next line. This patch greps for names at start of line.

Signed-off-by: Harish <harish@linux.vnet.ibm.com>
Reviewed-by: Eryu Guan <eguan@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

diff --git a/common/dmthin b/common/dmthin
index e774175a648ebeae2febe24f7bc393c42b2e5417..baab62848c3d6cba7d3b3b2ec7dcc21e59748330 100644 (file)
--- a/common/dmthin
+++ b/common/dmthin
@@ -178,12 +178,12 @@ _dmthin_grow()
        local blk_dev_size=`blockdev --getsz $dm_backing_dev`
 
        # Get current sizes & values
-       local   meta_dev_size=`$DMSETUP_PROG table | grep $DMTHIN_META_NAME | awk '{print $3}'`
-       local meta_dev_offset=`$DMSETUP_PROG table | grep $DMTHIN_META_NAME | awk '{print $6}'`
-       local   data_dev_size=`$DMSETUP_PROG table | grep $DMTHIN_DATA_NAME | awk '{print $3}'`
-       local   pool_dev_size=`$DMSETUP_PROG table | grep $DMTHIN_POOL_NAME | awk '{print $3}'`
-       local    cluster_size=`$DMSETUP_PROG table | grep $DMTHIN_POOL_NAME | awk '{print $7}'`
-       local       low_water=`$DMSETUP_PROG table | grep $DMTHIN_POOL_NAME | awk '{print $8}'`
+       local   meta_dev_size=`$DMSETUP_PROG table | grep ^$DMTHIN_META_NAME | awk '{print $3}'`
+       local meta_dev_offset=`$DMSETUP_PROG table | grep ^$DMTHIN_META_NAME | awk '{print $6}'`
+       local   data_dev_size=`$DMSETUP_PROG table | grep ^$DMTHIN_DATA_NAME | awk '{print $3}'`
+       local   pool_dev_size=`$DMSETUP_PROG table | grep ^$DMTHIN_POOL_NAME | awk '{print $3}'`
+       local    cluster_size=`$DMSETUP_PROG table | grep ^$DMTHIN_POOL_NAME | awk '{print $7}'`
+       local       low_water=`$DMSETUP_PROG table | grep ^$DMTHIN_POOL_NAME | awk '{print $8}'`
 
        # default to 25% growth
        if [ -z "$add_sectors" ]; then