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320 lines
7.7 KiB
Bash
320 lines
7.7 KiB
Bash
#!/bin/sh
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# Copyright (C) 2014 OpenWrt.org
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#
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. /lib/functions.sh
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# 'kernel' partition on NAND contains the kernel
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CI_KERNPART="${CI_KERNPART:-kernel}"
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# 'ubi' partition on NAND contains UBI
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CI_UBIPART="${CI_UBIPART:-ubi}"
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# 'rootfs' partition on NAND contains the rootfs
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CI_ROOTPART="${CI_ROOTPART:-rootfs}"
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ubi_mknod() {
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local dir="$1"
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local dev="/dev/$(basename $dir)"
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[ -e "$dev" ] && return 0
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local devid="$(cat $dir/dev)"
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local major="${devid%%:*}"
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local minor="${devid##*:}"
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mknod "$dev" c $major $minor
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}
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nand_find_volume() {
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local ubidevdir ubivoldir
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ubidevdir="/sys/devices/virtual/ubi/$1"
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[ ! -d "$ubidevdir" ] && return 1
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for ubivoldir in $ubidevdir/${1}_*; do
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[ ! -d "$ubivoldir" ] && continue
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if [ "$( cat $ubivoldir/name )" = "$2" ]; then
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basename $ubivoldir
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ubi_mknod "$ubivoldir"
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return 0
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fi
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done
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}
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nand_find_ubi() {
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local ubidevdir ubidev mtdnum
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mtdnum="$( find_mtd_index $1 )"
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[ ! "$mtdnum" ] && return 1
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for ubidevdir in /sys/devices/virtual/ubi/ubi*; do
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[ ! -d "$ubidevdir" ] && continue
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cmtdnum="$( cat $ubidevdir/mtd_num )"
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[ ! "$mtdnum" ] && continue
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if [ "$mtdnum" = "$cmtdnum" ]; then
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ubidev=$( basename $ubidevdir )
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ubi_mknod "$ubidevdir"
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echo $ubidev
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return 0
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fi
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done
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}
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nand_get_magic_long() {
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dd if="$1" skip=$2 bs=4 count=1 2>/dev/null | hexdump -v -n 4 -e '1/1 "%02x"'
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}
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get_magic_long_tar() {
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( tar xf $1 $2 -O | dd bs=4 count=1 | hexdump -v -n 4 -e '1/1 "%02x"') 2> /dev/null
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}
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identify_magic() {
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local magic=$1
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case "$magic" in
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"55424923")
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echo "ubi"
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;;
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"31181006")
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echo "ubifs"
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;;
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"68737173")
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echo "squashfs"
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;;
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"d00dfeed")
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echo "fit"
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;;
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"4349"*)
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echo "combined"
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;;
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*)
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echo "unknown $magic"
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;;
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esac
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}
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identify() {
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identify_magic $(nand_get_magic_long "$1" "${2:-0}")
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}
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identify_tar() {
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identify_magic $(get_magic_long_tar "$1" "$2")
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}
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nand_restore_config() {
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sync
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local ubidev=$( nand_find_ubi $CI_UBIPART )
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local ubivol="$( nand_find_volume $ubidev rootfs_data )"
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[ ! "$ubivol" ] &&
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ubivol="$( nand_find_volume $ubidev $CI_ROOTPART )"
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mkdir /tmp/new_root
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if ! mount -t ubifs /dev/$ubivol /tmp/new_root; then
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echo "mounting ubifs $ubivol failed"
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rmdir /tmp/new_root
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return 1
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fi
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mv "$1" "/tmp/new_root/$BACKUP_FILE"
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umount /tmp/new_root
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sync
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rmdir /tmp/new_root
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}
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nand_upgrade_prepare_ubi() {
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local rootfs_length="$1"
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local rootfs_type="$2"
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local has_kernel="${3:-0}"
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local has_env="${4:-0}"
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local mtdnum="$( find_mtd_index "$CI_UBIPART" )"
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if [ ! "$mtdnum" ]; then
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echo "cannot find ubi mtd partition $CI_UBIPART"
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return 1
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fi
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local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
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if [ ! "$ubidev" ]; then
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ubiattach -m "$mtdnum"
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sync
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ubidev="$( nand_find_ubi "$CI_UBIPART" )"
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fi
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if [ ! "$ubidev" ]; then
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ubiformat /dev/mtd$mtdnum -y
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ubiattach -m "$mtdnum"
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sync
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ubidev="$( nand_find_ubi "$CI_UBIPART" )"
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[ "$has_env" -gt 0 ] && {
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ubimkvol /dev/$ubidev -n 0 -N ubootenv -s 1MiB
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ubimkvol /dev/$ubidev -n 1 -N ubootenv2 -s 1MiB
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}
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fi
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local kern_ubivol="$( nand_find_volume $ubidev $CI_KERNPART )"
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local root_ubivol="$( nand_find_volume $ubidev $CI_ROOTPART )"
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local data_ubivol="$( nand_find_volume $ubidev rootfs_data )"
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# remove ubiblock device of rootfs
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local root_ubiblk="ubiblock${root_ubivol:3}"
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if [ "$root_ubivol" -a -e "/dev/$root_ubiblk" ]; then
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echo "removing $root_ubiblk"
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if ! ubiblock -r /dev/$root_ubivol; then
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echo "cannot remove $root_ubiblk"
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return 1;
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fi
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fi
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# kill volumes
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[ "$kern_ubivol" ] && ubirmvol /dev/$ubidev -N $CI_KERNPART || true
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[ "$root_ubivol" ] && ubirmvol /dev/$ubidev -N $CI_ROOTPART || true
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[ "$data_ubivol" ] && ubirmvol /dev/$ubidev -N rootfs_data || true
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# update kernel
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if [ "$has_kernel" = "1" ]; then
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if ! ubimkvol /dev/$ubidev -N $CI_KERNPART -s $kernel_length; then
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echo "cannot create kernel volume"
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return 1;
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fi
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fi
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# update rootfs
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local root_size_param
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if [ "$rootfs_type" = "ubifs" ]; then
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root_size_param="-m"
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else
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root_size_param="-s $rootfs_length"
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fi
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if ! ubimkvol /dev/$ubidev -N $CI_ROOTPART $root_size_param; then
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echo "cannot create rootfs volume"
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return 1;
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fi
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# create rootfs_data for non-ubifs rootfs
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if [ "$rootfs_type" != "ubifs" ]; then
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if ! ubimkvol /dev/$ubidev -N rootfs_data -m; then
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echo "cannot initialize rootfs_data volume"
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return 1
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fi
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fi
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sync
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return 0
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}
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nand_do_upgrade_success() {
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local conf_tar="/tmp/sysupgrade.tgz"
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sync
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[ -f "$conf_tar" ] && nand_restore_config "$conf_tar"
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echo "sysupgrade successful"
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umount -a
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reboot -f
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}
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# Flash the UBI image to MTD partition
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nand_upgrade_ubinized() {
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local ubi_file="$1"
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local mtdnum="$(find_mtd_index "$CI_UBIPART")"
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[ ! "$mtdnum" ] && {
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CI_UBIPART="rootfs"
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mtdnum="$(find_mtd_index "$CI_UBIPART")"
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}
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if [ ! "$mtdnum" ]; then
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echo "cannot find mtd device $CI_UBIPART"
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umount -a
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reboot -f
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fi
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local mtddev="/dev/mtd${mtdnum}"
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ubidetach -p "${mtddev}" || true
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sync
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ubiformat "${mtddev}" -y -f "${ubi_file}"
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ubiattach -p "${mtddev}"
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nand_do_upgrade_success
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}
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# Write the UBIFS image to UBI volume
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nand_upgrade_ubifs() {
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local rootfs_length=$( (cat $1 | wc -c) 2> /dev/null)
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nand_upgrade_prepare_ubi "$rootfs_length" "ubifs" "0" "0"
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local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
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local root_ubivol="$(nand_find_volume $ubidev $CI_ROOTPART)"
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ubiupdatevol /dev/$root_ubivol -s $rootfs_length $1
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nand_do_upgrade_success
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}
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nand_upgrade_tar() {
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local tar_file="$1"
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local kernel_mtd="$(find_mtd_index $CI_KERNPART)"
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local board_dir=$(tar tf $tar_file | grep -m 1 '^sysupgrade-.*/$')
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board_dir=${board_dir%/}
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local kernel_length=$( (tar xf $tar_file ${board_dir}/kernel -O | wc -c) 2> /dev/null)
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local rootfs_length=$( (tar xf $tar_file ${board_dir}/root -O | wc -c) 2> /dev/null)
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local rootfs_type="$(identify_tar "$tar_file" ${board_dir}/root)"
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local has_kernel=1
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local has_env=0
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[ "$kernel_length" != 0 -a -n "$kernel_mtd" ] && {
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tar xf $tar_file ${board_dir}/kernel -O | mtd write - $CI_KERNPART
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}
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[ "$kernel_length" = 0 -o ! -z "$kernel_mtd" ] && has_kernel=0
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nand_upgrade_prepare_ubi "$rootfs_length" "$rootfs_type" "$has_kernel" "$has_env"
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local ubidev="$( nand_find_ubi "$CI_UBIPART" )"
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[ "$has_kernel" = "1" ] && {
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local kern_ubivol="$(nand_find_volume $ubidev $CI_KERNPART)"
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tar xf $tar_file ${board_dir}/kernel -O | \
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ubiupdatevol /dev/$kern_ubivol -s $kernel_length -
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}
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local root_ubivol="$(nand_find_volume $ubidev $CI_ROOTPART)"
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tar xf $tar_file ${board_dir}/root -O | \
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ubiupdatevol /dev/$root_ubivol -s $rootfs_length -
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nand_do_upgrade_success
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}
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# Recognize type of passed file and start the upgrade process
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nand_do_upgrade() {
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local file_type=$(identify $1)
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[ ! "$(find_mtd_index "$CI_UBIPART")" ] && CI_UBIPART="rootfs"
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case "$file_type" in
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"ubi") nand_upgrade_ubinized $1;;
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"ubifs") nand_upgrade_ubifs $1;;
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*) nand_upgrade_tar $1;;
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esac
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}
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# Check if passed file is a valid one for NAND sysupgrade. Currently it accepts
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# 3 types of files:
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# 1) UBI - should contain an ubinized image, header is checked for the proper
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# MAGIC
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# 2) UBIFS - should contain UBIFS partition that will replace "rootfs" volume,
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# header is checked for the proper MAGIC
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# 3) TAR - archive has to include "sysupgrade-BOARD" directory with a non-empty
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# "CONTROL" file (at this point its content isn't verified)
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#
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# You usually want to call this function in platform_check_image.
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#
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# $(1): board name, used in case of passing TAR file
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# $(2): file to be checked
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nand_do_platform_check() {
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local board_name="$1"
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local tar_file="$2"
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local control_length=$( (tar xf $tar_file sysupgrade-$board_name/CONTROL -O | wc -c) 2> /dev/null)
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local file_type="$(identify $2)"
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[ "$control_length" = 0 -a "$file_type" != "ubi" -a "$file_type" != "ubifs" ] && {
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echo "Invalid sysupgrade file."
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return 1
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}
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return 0
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}
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