1 files changed, 66 insertions, 0 deletions
diff --git a/target/linux/x86/base-files/lib/upgrade/platform.sh b/target/linux/x86/base-files/lib/upgrade/platform.sh
new file mode 100644
index 0000000..73ab5ef
--- /dev/null
+++ b/target/linux/x86/base-files/lib/upgrade/platform.sh
@@ -0,0 +1,66 @@
+platform_export_bootpart() {
+	local cmdline uuid disk
+
+	if read cmdline < /proc/cmdline; then
+		case "$cmdline" in
+			*block2mtd=*)
+				disk="${cmdline##*block2mtd=}"
+				disk="${disk%%,*}"
+			;;
+			*root=*)
+				disk="${cmdline##*root=}"
+				disk="${disk%% *}"
+			;;
+		esac
+
+		case "$disk" in
+			PARTUUID=[a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9][a-f0-9]-02)
+				uuid="${disk#PARTUUID=}"
+				uuid="${uuid%-02}"
+				for disk in /dev/[hsv]d[a-z]; do
+					set -- $(dd if=$disk bs=1 skip=440 count=4 2>/dev/null | hexdump -v -e '4/1 "%02x "')
+					if [ "$4$3$2$1" = "$uuid" ]; then
+						export BOOTPART="${disk}1"
+						return 0
+					fi
+				done
+			;;
+			/dev/*)
+				export BOOTPART="${disk%[0-9]}1"
+				return 0
+			;;
+		esac
+	fi
+
+	return 1
+}
+
+platform_check_image() {
+	[ "$#" -gt 1 ] && return 1
+
+	case "$(get_magic_word "$1")" in
+		eb48|eb63) return 0;;
+		*)
+			echo "Invalid image type"
+			return 1
+		;;
+	esac
+}
+
+platform_copy_config() {
+	if [ -b "$BOOTPART" ]; then
+		mount -t ext4 -o rw,noatime "$BOOTPART" /mnt
+		cp -af "$CONF_TAR" /mnt/
+		umount /mnt
+	fi
+}
+
+platform_do_upgrade() {
+	platform_export_bootpart
+
+	if [ -b "${BOOTPART%[0-9]}" ]; then
+		sync
+		get_image "$@" | dd of="${BOOTPART%[0-9]}" bs=4096 conv=fsync
+		sleep 1
+	fi
+}