Initial commit

target/linux/armsr/base-files/lib/upgrade/platform.sh

@@ -0,0 +1,165 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+RAMFS_COPY_BIN="/usr/sbin/blkid"
+
+platform_check_image() {
+	local board=$(board_name)
+	local diskdev partdev diff
+	[ "$#" -gt 1 ] && return 1
+
+	v "Board is ${board}"
+
+	export_bootdevice && export_partdevice diskdev 0 || {
+		v "platform_check_image: Unable to determine upgrade device"
+		return 1
+	}
+
+	get_partitions "/dev/$diskdev" bootdisk
+
+	v "Extract boot sector from the image"
+	get_image_dd "$1" of=/tmp/image.bs count=63 bs=512b
+
+	get_partitions /tmp/image.bs image
+
+	#compare tables
+	diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+
+	rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
+
+	if [ -n "$diff" ]; then
+		v "Partition layout has changed. Full image will be written."
+		ask_bool 0 "Abort" && exit 1
+		return 0
+	fi
+}
+
+platform_copy_config() {
+	local partdev parttype=ext4
+
+	if export_partdevice partdev 1; then
+		part_magic_fat "/dev/$partdev" && parttype=vfat
+		mount -t $parttype -o rw,noatime "/dev/$partdev" /mnt
+		cp -af "$UPGRADE_BACKUP" "/mnt/$BACKUP_FILE"
+		umount /mnt
+	else
+		v "ERROR: Unable to find partition to copy config data to"
+	fi
+
+	sleep 5
+}
+
+# To avoid writing over any firmware
+# files (e.g ubootefi.var or firmware/X/ aka EBBR)
+# Copy efi/openwrt and efi/boot from the new image
+# to the existing ESP
+platform_do_upgrade_efi_system_partition() {
+	local image_file=$1
+	local target_partdev=$2
+	local image_efisp_start=$3
+	local image_efisp_size=$4
+
+	v "Updating ESP on ${target_partdev}"
+	NEW_ESP_DIR="/mnt/new_esp_loop"
+	CUR_ESP_DIR="/mnt/cur_esp"
+	mkdir "${NEW_ESP_DIR}"
+	mkdir "${CUR_ESP_DIR}"
+
+	get_image_dd "$image_file" of="/tmp/new_efi_sys_part.img" \
+		skip="$image_efisp_start" count="$image_efisp_size"
+
+	mount -t vfat -o loop -o ro /tmp/new_efi_sys_part.img "${NEW_ESP_DIR}"
+	if [ ! -d "${NEW_ESP_DIR}/efi/boot" ]; then
+		v "ERROR: Image does not contain EFI boot files (/efi/boot)"
+		return 1
+	fi
+
+	mount -t vfat "/dev/$partdev" "${CUR_ESP_DIR}"
+
+	for d in $(find "${NEW_ESP_DIR}/efi/" -mindepth 1 -maxdepth 1 -type d); do
+		v "Copying ${d}"
+		newdir_bname=$(basename "${d}")
+		rm -rf "${CUR_ESP_DIR}/efi/${newdir_bname}"
+		cp -r "${d}" "${CUR_ESP_DIR}/efi"
+	done
+
+	umount "${NEW_ESP_DIR}"
+	umount "${CUR_ESP_DIR}"
+}
+
+platform_do_upgrade() {
+	local board=$(board_name)
+	local diskdev partdev diff
+
+	export_bootdevice && export_partdevice diskdev 0 || {
+		v "platform_do_upgrade: Unable to determine upgrade device"
+		return 1
+	}
+
+	sync
+
+	if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
+		get_partitions "/dev/$diskdev" bootdisk
+
+		v "Extract boot sector from the image"
+		get_image_dd "$1" of=/tmp/image.bs count=63 bs=512b
+
+		get_partitions /tmp/image.bs image
+
+		#compare tables
+		diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
+	else
+		diff=1
+	fi
+
+	# Only change the partition table if sysupgrade -p is set,
+	# otherwise doing so could interfere with embedded "single storage"
+	# (e.g SoC boot from SD card) setups, as well as other user
+	# created storage (like uvol)
+	if [ -n "$diff" ] && [ "${UPGRADE_OPT_SAVE_PARTITIONS}" = "0" ]; then
+		# Need to remove partitions before dd, otherwise the partitions
+		# that are added after will have minor numbers offset
+		partx -d - "/dev/$diskdev"
+
+		get_image_dd "$1" of="/dev/$diskdev" bs=4096 conv=fsync
+
+		# Separate removal and addtion is necessary; otherwise, partition 1
+		# will be missing if it overlaps with the old partition 2
+		partx -a - "/dev/$diskdev"
+
+		return 0
+	fi
+
+	#iterate over each partition from the image and write it to the boot disk
+	while read part start size; do
+		if export_partdevice partdev $part; then
+			v "Writing image to /dev/$partdev..."
+			if [ "$part" = "1" ]; then
+				platform_do_upgrade_efi_system_partition \
+					$1 $partdev $start $size || return 1
+			else
+				v "Normal partition, doing DD"
+				get_image_dd "$1" of="/dev/$partdev" ibs=512 obs=1M skip="$start" \
+					count="$size" conv=fsync
+			fi
+		else
+			v "Unable to find partition $part device, skipped."
+		fi
+	done < /tmp/partmap.image
+
+	local parttype=ext4
+
+	if (blkid > /dev/null) && export_partdevice partdev 1; then
+		part_magic_fat "/dev/$partdev" && parttype=vfat
+		mount -t $parttype -o rw,noatime "/dev/$partdev" /mnt
+		if export_partdevice partdev 2; then
+			THIS_PART_BLKID=$(blkid -o value -s PARTUUID "/dev/${partdev}")
+			v "Setting rootfs PARTUUID=${THIS_PART_BLKID}"
+			sed -i "s/\(PARTUUID=\)[a-f0-9-]\+/\1${THIS_PART_BLKID}/ig" \
+				/mnt/efi/openwrt/grub.cfg
+		fi
+		umount /mnt
+	fi
+	# Provide time for the storage medium to flush before system reset
+	# (despite the sync/umount it appears NVMe etc. do it in the background)
+	sleep 5
+}