84 lines
2.2 KiB
Bash
84 lines
2.2 KiB
Bash
#
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# Copyright (C) 2016 lede-project.org
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#
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# this can be used as a generic mmc upgrade script
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# just add a device entry in platform.sh,
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# define "kernelname" and "rootfsname" and call mmc_do_upgrade
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# after the kernel and rootfs flash a loopdev (as overlay) is
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# setup on top of the rootfs partition
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# for the proper function a padded rootfs image is needed, basically
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# append "pad-to 64k" to the image definition
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# this is based on the ipq806x zyxel.sh mmc upgrade
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. /lib/functions.sh
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mmc_do_upgrade() {
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local tar_file="$1"
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local rootfs=
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local kernel=
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[ -z "$kernel" ] && kernel=$(find_mmc_part ${kernelname})
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[ -z "$rootfs" ] && rootfs=$(find_mmc_part ${rootfsname})
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[ -z "$kernel" ] && echo "Upgrade failed: kernel partition not found! Rebooting..." && reboot -f
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[ -z "$rootfs" ] && echo "Upgrade failed: rootfs partition not found! Rebooting..." && reboot -f
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mmc_do_flash $tar_file $kernel $rootfs
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return 0
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}
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mmc_do_flash() {
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local tar_file=$1
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local kernel=$2
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local rootfs=$3
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# keep sure its unbound
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losetup --detach-all || {
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echo Failed to detach all loop devices. Skip this try.
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reboot -f
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}
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# use the first found directory in the tar archive
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local board_dir=$(tar tf $tar_file | grep -m 1 '^sysupgrade-.*/$')
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board_dir=${board_dir%/}
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echo "flashing kernel to $kernel"
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tar xf $tar_file ${board_dir}/kernel -O >$kernel
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echo "flashing rootfs to ${rootfs}"
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tar xf $tar_file ${board_dir}/root -O >"${rootfs}"
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# a padded rootfs is needed for overlay fs creation
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local offset=$(tar xf $tar_file ${board_dir}/root -O | wc -c)
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[ $offset -lt 65536 ] && {
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echo Wrong size for rootfs: $offset
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sleep 10
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reboot -f
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}
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# Mount loop for rootfs_data
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local loopdev="$(losetup -f)"
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losetup -o $offset $loopdev $rootfs || {
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echo "Failed to mount looped rootfs_data."
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sleep 10
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reboot -f
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}
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echo "Format new rootfs_data at position ${offset}."
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mkfs.ext4 -F -L rootfs_data $loopdev
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mkdir /tmp/new_root
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mount -t ext4 $loopdev /tmp/new_root && {
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echo "Saving config to rootfs_data at position ${offset}."
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cp -v "$UPGRADE_BACKUP" "/tmp/new_root/$BACKUP_FILE"
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umount /tmp/new_root
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}
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# Cleanup
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losetup -d $loopdev >/dev/null 2>&1
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sync
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umount -a
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reboot -f
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}
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