Update trim to trim all mounted IQNs

trim

@@ -2,12 +2,8 @@
 
 IQN=$1
 
-if [[ -z "${IQN}" ]]; then
-	echo "usage: $0 TargetIQN"
-        echo ""
-
-	exit
-fi
+TrimIQN() {
+	IQN=$1
 
 	MULTIPATH=0
 	IQNTESTLIST=$(grep -h ${IQN} /sys/class/iscsi_session/*/targetname)
@@ -59,4 +55,13 @@ if [[ -z "${MOUNTPOINT}" || ! -d "${MOUNTPOINT}" ]]; then
 	fi
 
 	fstrim -v ${MOUNTPOINT}
+}
 
+if [[ -z "${IQN}" ]]; then
+	IQNLIST=$(cat /sys/class/iscsi_session/*/targetname | sort -u)
+	for IQN in ${IQNLIST}; do
+		TrimIQN ${IQN}
+	done
+else
+	TrimIQN ${IQN}
+fi