Add an option to only do a specific lv

scripts/backstep-traceback-auto

@@ -31,7 +31,17 @@ esac
 
 # Parse options
 OPTIND=1
-getopts ":v" OPTION
+while getopts ":o:v" OPTION
+do
+	case "$OPTION" in
+		o)
+			ONLY="$OPTARG"
+		;;
+		v)
+			VERBOSE="true"
+		;;
+	esac
+done
 # Remove option from parameters
 shift $(expr $OPTIND - 1)
 
@@ -49,7 +59,7 @@ else
 fi
 
 # Change sync options for when we are debugging
-if [ "$OPTION" = "v" ]
+if [ "$VERBOSE" = "true" ]
 then
 	syncopts="--debug --max-load=$DEBUG_MAX_LOAD"
 	set -ex
@@ -60,6 +70,11 @@ fi
 # Loop with all LVS
 for LV in "${BACKUP_LVS[@]}"
 do
+	if [ -n "$ONLY" ] && [ "$ONLY" != "$LV" ]
+	then
+		continue
+	fi
+
 	OLD_IFS="$IFS"
 	IFS=','