qos-scripts: fix uci callback handling

The previous callback code was fragile, dependent on some UCI callback
bugs and side-effects now fixed in master commit 73d8a6ab.

Update scripts to use callbacks where appropriate and necessary, while
using normal UCI config parsing for all else. This results in smaller,
simpler, more robust code. Use callbacks in generate.sh to only process
'interface' defaults and the varying entries for 'reclassify', 'default'
and 'classify' sections. Also switch qos-stat to use non-callback UCI
handling.

The current changes work independently of 73d8a6ab (i.e. both before and
after), and are consistent with UCI config parsing documentation.

Signed-off-by: Tony Ambardar <itugrok@yahoo.com>

package/network/config/qos-scripts/Makefile

@@ -8,7 +8,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=qos-scripts
-PKG_VERSION:=1.3.0
+PKG_VERSION:=1.3.1
 PKG_RELEASE:=1
 PKG_LICENSE:=GPL-2.0
 

package/network/config/qos-scripts/files/usr/bin/qos-stat

@@ -14,16 +14,17 @@ get_ifname() {
 	[ "$cfgt" = "interface" ] && config_get "$interface" ifname
 }
 
-config_cb() {
-	config_get TYPE "$CONFIG_SECTION" TYPE
+qos_set_device() {
+	config_get TYPE "$1" TYPE
 	[ "interface" = "$TYPE" ] && {
-		config_get device "$CONFIG_SECTION" ifname
-		[ -z "$device" ] && device="$(get_ifname ${CONFIG_SECTION})"
-		config_set "$CONFIG_SECTION" device "$device"
+		config_get device "$1" ifname
+		[ -z "$device" ] && device="$(get_ifname $1)"
+		config_set "$1" device "$device"
 	}
 }
 
 config_load qos
+config_foreach qos_set_device
 
 print_comments() {
 	echo ''

package/network/config/qos-scripts/files/usr/lib/qos/generate.sh

@@ -191,8 +191,6 @@ config_cb() {
 	option_cb() {
 		return 0
 	}
-
-	# Section start
 	case "$1" in
 		interface)
 			config_set "$2" "classgroup" "Default"
@@ -200,43 +198,41 @@ config_cb() {
 		;;
 		classify|default|reclassify)
 			option_cb() {
-				append options "$1"
+				append "CONFIG_${CONFIG_SECTION}_options" "$1"
 			}
 		;;
 	esac
+}
 
-    # Section end
-	config_get TYPE "$CONFIG_SECTION" TYPE
+qos_parse_config() {
+	config_get TYPE "$1" TYPE
 	case "$TYPE" in
 		interface)
-			config_get_bool enabled "$CONFIG_SECTION" enabled 1
-			[ 1 -eq "$enabled" ] || return 0
-			config_get classgroup "$CONFIG_SECTION" classgroup
-			config_set "$CONFIG_SECTION" ifbdev "$C"
-			C=$(($C+1))
-			append INTERFACES "$CONFIG_SECTION"
-			config_set "$classgroup" enabled 1
-			config_get device "$CONFIG_SECTION" device
-			[ -z "$device" ] && {
-				device="$(find_ifname ${CONFIG_SECTION})"
-				config_set "$CONFIG_SECTION" device "$device"
+			config_get_bool enabled "$1" enabled 1
+			[ 1 -eq "$enabled" ] && {
+				config_get classgroup "$1" classgroup
+				config_set "$1" ifbdev "$C"
+				C=$(($C+1))
+				append INTERFACES "$1"
+				config_set "$classgroup" enabled 1
+				config_get device "$1" device
+				[ -z "$device" ] && {
+					device="$(find_ifname $1)"
+					config_set "$1" device "$device"
+				}
 			}
 		;;
-		classgroup) append CG "$CONFIG_SECTION";;
+		classgroup) append CG "$1";;
 		classify|default|reclassify)
 			case "$TYPE" in
 				classify) var="ctrules";;
 				*) var="rules";;
 			esac
-			config_get target "$CONFIG_SECTION" target
-			config_set "$CONFIG_SECTION" options "$options"
-			append "$var" "$CONFIG_SECTION"
-			unset options
+			append "$var" "$1"
 		;;
 	esac
 }
 
-
 enum_classes() {
 	local c="0"
 	config_get classes "$1" classes
@@ -500,7 +496,10 @@ INTERFACES=""
 [ -e ./qos.conf ] && {
 	. ./qos.conf
 	config_cb
-} || config_load qos
+} || {
+	config_load qos
+	config_foreach qos_parse_config
+}
 
 C="0"
 for iface in $INTERFACES; do