diff options
Diffstat (limited to 'target/linux/x86')
| -rw-r--r-- | target/linux/x86/Makefile | 2 | ||||
| -rw-r--r-- | target/linux/x86/base-files/lib/upgrade/platform.sh | 51 |
2 files changed, 51 insertions, 2 deletions
diff --git a/target/linux/x86/Makefile b/target/linux/x86/Makefile index e4bc0d9a50..45bb8c7cac 100644 --- a/target/linux/x86/Makefile +++ b/target/linux/x86/Makefile @@ -13,6 +13,8 @@ FEATURES:=squashfs ext4 vdi vmdk pcmcia targz SUBTARGETS=generic xen_domu ep80579 geode kvm_guest 64 MAINTAINER:=Felix Fietkau <nbd@openwrt.org> +DEFAULT_PACKAGES += partx-utils + KERNEL_PATCHVER:=4.4 KERNELNAME:=bzImage diff --git a/target/linux/x86/base-files/lib/upgrade/platform.sh b/target/linux/x86/base-files/lib/upgrade/platform.sh index 73ab5ef079..86696aec04 100644 --- a/target/linux/x86/base-files/lib/upgrade/platform.sh +++ b/target/linux/x86/base-files/lib/upgrade/platform.sh @@ -55,12 +55,59 @@ platform_copy_config() { fi } +get_partitions() { # <device> <filename> + local disk="$1" + local filename="$2" + + if [ -b "$disk" -o -f "$disk" ]; then + echo "Reading partition table from $filename..." + partx -r "$disk" -gbo NR,START,SECTORS > "/tmp/partx.$filename" + fi +} + platform_do_upgrade() { platform_export_bootpart + disk="${BOOTPART%[0-9]}" - if [ -b "${BOOTPART%[0-9]}" ]; then + if [ -b "$disk" ]; then sync - get_image "$@" | dd of="${BOOTPART%[0-9]}" bs=4096 conv=fsync + if [ "$SAVE_PARTITIONS" = "1" ]; then + get_partitions "$disk" bootdisk + + + #get block size + sectors="$(partx -r $disk -gbo SECTORS --nr 1:1)" + size="$(partx -r $disk -gbo SIZE --nr 1:1)" + ibs="$(($size / $sectors))" + + #extract the boot sector from the image + get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b + + get_partitions /tmp/image.bs image + + #compare tables + diff="$(grep -F -x -v -f /tmp/partx.bootdisk /tmp/partx.image)" + if [ -n "$diff" ]; then + echo "Partition layout is changed. Full image will be written." + ask_bool 0 "Abort" && exit + + get_image "$@" | dd of="$disk" bs=4096 conv=fsync + return 0 + fi + + #iterate over each partition from the image and write it to the boot disk + while read part start size; do + echo "Writing image to $disk$part..." + get_image "$@" | dd of="$disk$part" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync + done < /tmp/partx.image + + #copy partition uuid + echo "Writing new UUID to $disk$part..." + get_image "$@" | dd of="$disk" bs=1 skip=440 count=4 seek=440 conv=fsync + else + get_image "$@" | dd of="$disk" bs=4096 conv=fsync + fi + sleep 1 fi } |