From 073dc450b5ca91cfffd9097f0e3900dd390be399 Mon Sep 17 00:00:00 2001 From: Rodrigo Balerdi Date: Fri, 15 Apr 2022 00:59:49 -0300 Subject: [PATCH] base-files: safer sysupgrade for kernel-in-UBI devices Ensure that the kernel CRC is invalidated while rootfs is being updated. This allows the bootloader to detect an interrupted sysupgrade and fall back to an alternate booting method, instead of just going ahead with normal boot and effectively bricking the device. Possible fallbacks include a recovery initramfs partition or UBI volume and TFTP. See here for an example U-Boot configuration with fallbacks: https://shorturl.at/befsA (https://github.com/Lanchon/openwrt-tr4400-v2/ blob/e7d707d6bd7839fbd0b8d0bd180fce451df77e47/install-recovery.sh#L52-L63) Signed-off-by: Rodrigo Balerdi --- package/base-files/files/lib/upgrade/nand.sh | 14 +++++++------- 1 file changed, 7 insertions(+), 7 deletions(-) diff --git a/package/base-files/files/lib/upgrade/nand.sh b/package/base-files/files/lib/upgrade/nand.sh index b5c982b2722..f927c066dab 100644 --- a/package/base-files/files/lib/upgrade/nand.sh +++ b/package/base-files/files/lib/upgrade/nand.sh @@ -288,7 +288,7 @@ nand_upgrade_tar() { local board_dir=$(tar tf "$tar_file" | grep -m 1 '^sysupgrade-.*/$') board_dir=${board_dir%/} - kernel_length=$( (tar xf "$tar_file" ${board_dir}/kernel -O | wc -c) 2> /dev/null) + local kernel_length=$( (tar xf "$tar_file" ${board_dir}/kernel -O | wc -c) 2> /dev/null) local has_rootfs=0 local rootfs_length local rootfs_type @@ -311,17 +311,17 @@ nand_upgrade_tar() { nand_upgrade_prepare_ubi "$rootfs_length" "$rootfs_type" "${has_kernel:+$kernel_length}" "$has_env" local ubidev="$( nand_find_ubi "$CI_UBIPART" )" - [ "$has_kernel" = "1" ] && { - local kern_ubivol="$( nand_find_volume $ubidev $CI_KERNPART )" - tar xf "$tar_file" ${board_dir}/kernel -O | \ - ubiupdatevol /dev/$kern_ubivol -s $kernel_length - - } - [ "$has_rootfs" = "1" ] && { local root_ubivol="$( nand_find_volume $ubidev $CI_ROOTPART )" tar xf "$tar_file" ${board_dir}/root -O | \ ubiupdatevol /dev/$root_ubivol -s $rootfs_length - } + + [ "$has_kernel" = "1" ] && { + local kern_ubivol="$( nand_find_volume $ubidev $CI_KERNPART )" + tar xf "$tar_file" ${board_dir}/kernel -O | \ + ubiupdatevol /dev/$kern_ubivol -s $kernel_length - + } nand_do_upgrade_success } -- 2.30.2