base-files: fwtool: implement compatibility check for images

[openwrt/openwrt.git] / package / base-files / files / lib / upgrade / fwtool.sh

diff --git a/package/base-files/files/lib/upgrade/fwtool.sh b/package/base-files/files/lib/upgrade/fwtool.sh
index a0b3fb0a04826282855abc8644d83a79d00374b7..e8277f6fccc8fdc3c93aa770ffe0b153f11b22c0 100644 (file)
--- a/package/base-files/files/lib/upgrade/fwtool.sh
+++ b/package/base-files/files/lib/upgrade/fwtool.sh
@@ -44,13 +44,35 @@ fwtool_check_image() {
        }
 
        device="$(cat /tmp/sysinfo/board_name)"
+       devicecompat="$(uci -q get system.@system[0].compat_version)"
+       [ -n "$devicecompat" ] || devicecompat="1.0"
+
+       json_get_var imagecompat compat_version
+       json_get_var compatmessage compat_message
+       [ -n "$imagecompat" ] || imagecompat="1.0"
 
        json_select supported_devices || return 1
 
        json_get_keys dev_keys
        for k in $dev_keys; do
                json_get_var dev "$k"
-               [ "$dev" = "$device" ] && return 0
+               if [ "$dev" = "$device" ]; then
+                       # major compat version -> no sysupgrade
+                       if [ "${devicecompat%.*}" != "${imagecompat%.*}" ]; then
+                               echo "The device is supported, but this image is incompatible for sysupgrade based on the image version ($devicecompat->$imagecompat)."
+                               [ -n "$compatmessage" ] && echo "$compatmessage"
+                               return 1
+                       fi
+
+                       # minor compat version -> sysupgrade with -n required
+                       if [ "${devicecompat#.*}" != "${imagecompat#.*}" ] && [ "$SAVE_CONFIG" = "1" ]; then
+                               echo "The device is supported, but the config is incompatible to the new image ($devicecompat->$imagecompat). Please upgrade without keeping config (sysupgrade -n)."
+                               [ -n "$compatmessage" ] && echo "$compatmessage"
+                               return 1
+                       fi
+
+                       return 0
+               fi
        done
 
        echo "Device $device not supported by this image"