main/vlan: fix support for both ipv4 and ipv6 address on vlans

ref #9018

main/vlan/APKBUILD

 # Contributor: Natanael Copa <ncopa@alpinelinux.org>
 # Maintainer: Natanael Copa <ncopa@alpinelinux.org>
 pkgname=vlan
-pkgver=2.1
-pkgrel=2
+pkgver=2.2
+pkgrel=0
 pkgdesc="Scripts for configuring VLAN network interfaces"
 url="http://wiki.alpinelinux.org/wiki/Vlan"
 arch="noarch"
@@ -33,4 +33,4 @@ package() {
 sha512sums="f00c8521830b1472f1e71223943c14446d28f2667f7e2fd3690c8402c7d3f34982bc4d27201b3dc9c1eb9a635e38ea23dee6e044487615cbc68ba519d940c0f7  mvlan.post-down
 955ccc68398ed2d515f794d5ef4164fec2dcfc4504e2e29d427c1687c8b9d6ecff1ea7247dc751963bb7be1db5025940fb66efef3fb6287aa19fe014088573ac  mvlan.pre-up
 7a6e74957d2fcfb04023d2cf8246e8889a780171f669ec37a56882276d96fb0219180b37cc51ecd87421bcbd0f0d489602423859a6f5605781f703cf143e5bae  vlan.post-down
-54af6be8962a19f5cc3781ab6e42046c2017b58adc90464fe9e1aeea0e4151792920588c84285c727e104e3232adf1d79b0b7d5edfdd53a76b02a764af555e37  vlan.pre-up"
+0ebf1556de28eeabad0cf9ddb6c38e7c25672ca28fd708e1d4670d65ecc8573df4f4f651cb9f59c1ab8fcedcc382c8e834521dcf8ed10a554567823301aac10f  vlan.pre-up"

main/vlan/vlan.pre-up

@@ -27,6 +27,10 @@ if [ -z "$RAW_DEVICE" ]; then
 	exit 1
 fi
 
+if [ -e /sys/class/net/$IFACE ]; then
+	exit 0
+fi
+
 if ! ip link show "$RAW_DEVICE" >/dev/null; then
 	echo "Device $RAW_DEVICE for $IFACE does not exist"
 	exit 1
@@ -36,12 +40,5 @@ if ! [ -d /proc/net/vlan ]; then
 	modprobe 8021q
 fi
 
-if ! [ -e /sys/class/net/$IFACE ]; then
-	ip link set dev "$RAW_DEVICE" up
-	ip link add link "$RAW_DEVICE" name "$IFACE" type vlan id "$VLAN_ID"
-fi
-
-if ! ip link show "$IFACE" >/dev/null; then
-	echo "Failed to create vlan device $IFACE on device $RAW_DEVICE with tag $VLAN_ID"
-	exit 1
-fi
+ip link set dev "$RAW_DEVICE" up
+ip link add link "$RAW_DEVICE" name "$IFACE" type vlan id "$VLAN_ID"