Update dockerd.patch

.github/diy/patches/dockerd.patch

@@ -1,3 +1,77 @@
+--- a/dockerd/Makefile
++++ b/dockerd/Makefile
+@@ -2,6 +2,7 @@
+ 
+ USE_PROCD=1
+ START=99
++STOP=10
+ 
+ extra_command "uciadd" "<interface> <device> <zone> Add docker bridge configuration to network and firewall uci config"
+ extra_command "ucidel" "<interface> <device> <zone> Delete docker bridge configuration from network and firewall uci config"
+@@ -238,6 +239,8 @@ start_service() {
+ 		procd_set_param command /usr/bin/dockerd --config-file="${DOCKERD_CONF}"
+ 	fi
+ 	procd_set_param limits nofile="${nofile} ${nofile}"
++	# Give dockerd the time to stop the containers before it gets killed
++	procd_set_param term_timeout 300
+ 	procd_close_instance
+ }
+ 
+@@ -293,8 +296,50 @@ iptables_add_blocking_rule() {
+ 	config_list_foreach "${cfg}" blocked_interfaces handle_iptables_rule "${device}" "${extra_iptables_args}"
+ }
+ 
++# Read procd's notifications until one contains the given text, or none comes for the given seconds
++procd_notification() {
++	local line
++
++	while read -r -t "${2}" line <&3; do
++		case "${line}" in
++		*"${1}"*) return 0 ;;
++		esac
++	done
++	return 1
++}
++
+ stop_service() {
+-	if /etc/init.d/dockerd running; then
+-		service_stop "/usr/bin/dockerd"
+-	fi
++	local i=0
++
++	procd_running dockerd || return 0
++
++	# Subscribe to procd's notifications before it stops dockerd, to learn when it is done.
++	# The subscriber leaves procd's lock (fd 1000) to this script, which releases it on exit.
++	STOP_EVENTS="/var/run/dockerd.stop.$$"
++	mkfifo "${STOP_EVENTS}" || return 0
++	ubus -t 330 subscribe service > "${STOP_EVENTS}" 1000>&- &
++	STOP_SUBSCRIBER=$!
++	exec 3< "${STOP_EVENTS}"
++
++	# The subscription takes effect a moment later, and a stop notified before it would be missed:
++	# wait until procd passes on an event sent to itself
++	while [ "${i}" -lt 10 ]; do
++		ubus call service event '{ "type": "dockerd.stopping", "data": {} }'
++		if procd_notification '"type":"dockerd.stopping"' 1; then
++			STOP_SUBSCRIBED=1
++			return 0
++		fi
++		i=$((i + 1))
++	done
++}
++
++service_stopped() {
++	[ -n "${STOP_EVENTS}" ] || return 0
++
++	# Wait for dockerd, which exits after stopping the containers, so that a shutdown unmounts the data root after them
++	[ -n "${STOP_SUBSCRIBED}" ] && procd_notification '"service.stop": {"service":"dockerd"}' 330
++	exec 3<&-
++	# A restart ignores SIGTERM while it stops dockerd, and so does the subscriber it started
++	kill -KILL "${STOP_SUBSCRIBER}" 2> /dev/null
++	rm -f "${STOP_EVENTS}"
+ }
+
 --- a/dockerd/Makefile
 +++ b/dockerd/Makefile
 @@ -47,6 +47,8 @@ define Package/dockerd