diff options
Diffstat (limited to 'target/linux/ipq40xx/base-files/lib/upgrade/dualboot_datachk.sh')
| -rw-r--r-- | target/linux/ipq40xx/base-files/lib/upgrade/dualboot_datachk.sh | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/target/linux/ipq40xx/base-files/lib/upgrade/dualboot_datachk.sh b/target/linux/ipq40xx/base-files/lib/upgrade/dualboot_datachk.sh new file mode 100644 index 0000000000..807a85d43c --- /dev/null +++ b/target/linux/ipq40xx/base-files/lib/upgrade/dualboot_datachk.sh @@ -0,0 +1,106 @@ +# The U-Boot loader with the datachk patchset for dualbooting requires image +# sizes and checksums to be provided in the U-Boot environment. +# The devices come with 2 main partitions - while one is active +# sysupgrade will flash the other. The boot order is changed to boot the +# newly flashed partition. If the new partition can't be booted due to +# upgrade failures the previously used partition is loaded. + +platform_do_upgrade_dualboot_datachk() { + local tar_file="$1" + local restore_backup + local primary_kernel_mtd + + local setenv_script="/tmp/fw_env_upgrade" + + local kernel_mtd="$(find_mtd_index $PART_NAME)" + local kernel_offset="$(cat /sys/class/mtd/mtd${kernel_mtd}/offset)" + local total_size="$(cat /sys/class/mtd/mtd${kernel_mtd}/size)" + + # detect to which flash region the new image is written to. + # + # 1. check what is the mtd index for the first flash region on this + # device + # 2. check if the target partition ("inactive") has the mtd index of + # the first flash region + # + # - when it is: the new bootseq will be 1,2 and the first region is + # modified + # - when it isnt: bootseq will be 2,1 and the second region is + # modified + # + # The detection has to be done via the hardcoded mtd partition because + # the current boot might be done with the fallback region. Let us + # assume that the current bootseq is 1,2. The bootloader detected that + # the image in flash region 1 is corrupt and thus switches to flash + # region 2. The bootseq in the u-boot-env is now still the same and + # the sysupgrade code can now only rely on the actual mtd indexes and + # not the bootseq variable to detect the currently booted flash + # region/image. + # + # In the above example, an implementation which uses bootseq ("1,2") to + # detect the currently booted image would assume that region 1 is booted + # and then overwrite the variables for the wrong flash region (aka the + # one which isn't modified). This could result in a device which doesn't + # boot anymore to Linux until it was reflashed with ap51-flash. + local next_boot_part="1" + case "$(board_name)" in + openmesh,a42) + primary_kernel_mtd=8 + ;; + openmesh,a62) + primary_kernel_mtd=10 + ;; + *) + echo "failed to detect primary kernel mtd partition for board" + return 1 + ;; + esac + [ "$kernel_mtd" = "$primary_kernel_mtd" ] || next_boot_part="2" + + local board_dir=$(tar tf $tar_file | grep -m 1 '^sysupgrade-.*/$') + board_dir=${board_dir%/} + + local kernel_length=$(tar xf $tar_file ${board_dir}/kernel -O | wc -c) + local rootfs_length=$(tar xf $tar_file ${board_dir}/root -O | wc -c) + # rootfs without EOF marker + rootfs_length=$((rootfs_length-4)) + + local kernel_md5=$(tar xf $tar_file ${board_dir}/kernel -O | md5sum); kernel_md5="${kernel_md5%% *}" + # md5 checksum of rootfs with EOF marker + local rootfs_md5=$(tar xf $tar_file ${board_dir}/root -O | dd bs=1 count=$rootfs_length | md5sum); rootfs_md5="${rootfs_md5%% *}" + + # + # add tar support to get_image() to use default_do_upgrade() instead? + # + + # take care of restoring a saved config + [ -n "$UPGRADE_BACKUP" ] && restore_backup="${MTD_CONFIG_ARGS} -j ${UPGRADE_BACKUP}" + + mtd -q erase inactive + tar xf $tar_file ${board_dir}/root -O | mtd -n -p $kernel_length $restore_backup write - $PART_NAME + tar xf $tar_file ${board_dir}/kernel -O | mtd -n write - $PART_NAME + + # prepare new u-boot env + if [ "$next_boot_part" = "1" ]; then + echo "bootseq 1,2" > $setenv_script + else + echo "bootseq 2,1" > $setenv_script + fi + + printf "kernel_size_%i 0x%08x\n" $next_boot_part $kernel_length >> $setenv_script + printf "vmlinux_start_addr 0x%08x\n" ${kernel_offset} >> $setenv_script + printf "vmlinux_size 0x%08x\n" ${kernel_length} >> $setenv_script + printf "vmlinux_checksum %s\n" ${kernel_md5} >> $setenv_script + + printf "rootfs_size_%i 0x%08x\n" $next_boot_part $((total_size-kernel_length)) >> $setenv_script + printf "rootfs_start_addr 0x%08x\n" $((kernel_offset+kernel_length)) >> $setenv_script + printf "rootfs_size 0x%08x\n" ${rootfs_length} >> $setenv_script + printf "rootfs_checksum %s\n" ${rootfs_md5} >> $setenv_script + + # store u-boot env changes + mkdir -p /var/lock + fw_setenv -s $setenv_script || { + echo "failed to update U-Boot environment" + return 1 + } +} |