[package] firewall:

- defer firewall start until the first interface is brought up by hotplug, fixes race conditions on slow devices
	- create a file lock during firewall start and wait for it in hotplug events, prevents race conditions between start and addif
	- start firewall actions in background from hotplug handler since the firewall itself fires further hotplug events which results in a deadlock if not forked off
	- get loaded state direcly from the uci binary since updated value is not recognized by config_get after uci_set_state
	- bump package revision to r2


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@21486 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/firewall/files/lib/core.sh

@@ -8,6 +8,8 @@ include /lib/network
 fw_start() {
 	fw_init
 
+	lock /var/lock/firewall.start
+
 	FW_DEFAULTS_APPLIED=
 
 	fw_is_loaded && {
@@ -49,6 +51,8 @@ fw_start() {
 	fw_callback post core
 
 	uci_set_state firewall core loaded 1
+
+	lock -u /var/lock/firewall.start
 }
 
 fw_stop() {
@@ -75,9 +79,8 @@ fw_reload() {
 }
 
 fw_is_loaded() {
-	local bool
-	config_get_bool bool core loaded 0
-	return $((! $bool))
+	local bool=$(uci -q -P /var/state get firewall.core.loaded)
+	return $((! ${bool:-0}))
 }