Update executors to reflect new create/destroy phase.

Signed-off-by: Maximilian Wilhelm <max@sdn.clinic>

executor-scripts/linux/bridge

@@ -4,6 +4,7 @@ set -e
 
 # Copyright (C) 2012, 2020 Natanael Copa <ncopa@alpinelinux.org>
 # Copyright (C) 2020 Ariadne Conill <ariadne@dereferenced.org>
+# Copyright (C) 2020 Maximilian Wilhelm <max@sdn.clinic>
 #
 # Permission to use, copy, modify, and/or distribute this software for any
 # purpose with or without fee is hereby granted, provided that the above
@@ -134,8 +135,12 @@ esac
 [ -z "$PORTS" ] && ! env | grep -q "^IF_BRIDGE" && exit
 
 case "$PHASE" in
+create)
+	if [ ! -d "/sys/class/net/${IFACE}" ]; then
+		brctl addbr "${IFACE}"
+	fi
+	;;
 pre-up)
-	brctl addbr $IFACE || exit 1
 	wait_ports
 	set_bridge_opts
 	add_ports
@@ -144,6 +149,10 @@ pre-up)
 post-down)
 	del_ports
 	ip link set dev $IFACE down
-	brctl delbr $IFACE || exit 1
+	;;
+destroy)
+	if [ -d "/sys/class/net/${IFACE}" ]; then
+		brctl delbr "${IFACE}"
+	fi
 	;;
 esac