Add new SKIP_DOWN_AT_SYSRESET /etc/init.d/networking config option to

skip deconfiguring interfaces

Ticket: CM-5900
Reviewed By: CCR-2921
Testing Done: Tested 'service networking stop' during system reboot and shutdown

config/networking

@@ -15,3 +15,9 @@ SYSLOG="no"
 
 # Exclude interfaces
 EXCLUDE_INTERFACES=
+
+# Set to 'yes' if you want to skip ifdown during system reboot
+# and shutdown. This is of interest in large scale interface
+# deployments where you dont want to wait for interface
+# deconfiguration to speed up shutdown/reboot
+SKIP_DOWN_AT_SYSRESET="yes"

init.d/networking

@@ -147,6 +147,18 @@ start)
 	;;
 
 stop)
+	if [ "$SKIP_DOWN_AT_SYSRESET" = "yes" ]; then
+		shutdown_or_reboot=$(runlevel 2>/dev/null | \
+				     /usr/bin/tr -s " " | \
+				     /usr/bin/cut -d " " \
+				     -f1- --output-delimiter=$'\n' | \
+				     /bin/grep -e "0" -e "6")
+		if [ -n "$shutdown_or_reboot" ]; then
+			log_action_begin_msg "Deconfiguring network interfaces..skip"
+			log_action_end_msg 0
+			exit 0
+		fi
+	fi
 	ifupdown_init
 	check_network_file_systems
 	check_network_swap