mediatek: filogic: set wan label in preinit

Implement the functionality of
target/linux/ramips/patches-5.15/700-net-ethernet-mediatek-support-net-labels.patch
in userspace, since the driver patch has been rejected as a generic solution:
https://github.com/openwrt/openwrt/pull/11435

Signed-off-by: Bjørn Mork <bjorn@mork.no>
(cherry picked from commit 1dd1ac2c356ad37366dde64b624e5eb489b19393)

diff --git a/target/linux/mediatek/filogic/base-files/lib/preinit/04_set_netdev_label b/target/linux/mediatek/filogic/base-files/lib/preinit/04_set_netdev_label
new file mode 100644 (file)
index 0000000..f8b6f15
--- /dev/null
+++ b/target/linux/mediatek/filogic/base-files/lib/preinit/04_set_netdev_label
@@ -0,0 +1,15 @@
+set_netdev_labels() {
+       local dir
+       local label
+       local netdev
+
+       for dir in /sys/class/net/*; do
+               [ -r "$dir/of_node/label" ] || continue
+               label="$(cat "$dir/of_node/label")"
+               netdev="$(basename $dir)"
+               [ "$netdev" = "$label" ] && continue
+               ip link set "$netdev" name "$label"
+       done
+}
+
+boot_hook_add preinit_main set_netdev_labels