target/linux/rockchip/armv8/base-files/lib/upgrade/platform.sh

   1 REQUIRE_IMAGE_METADATA=1
   2
   3 platform_check_image() {
   4         local diskdev partdev diff
   5
   6         export_bootdevice && export_partdevice diskdev 0 || {
   7                 echo "Unable to determine upgrade device"
   8                 return 1
   9         }
  10
  11         get_partitions "/dev/$diskdev" bootdisk
  12
  13         #extract the boot sector from the image
  14         get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b 2>/dev/null
  15
  16         get_partitions /tmp/image.bs image
  17
  18         #compare tables
  19         diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
  20
  21         rm -f /tmp/image.bs /tmp/partmap.bootdisk /tmp/partmap.image
  22
  23         if [ -n "$diff" ]; then
  24                 echo "Partition layout has changed. Full image will be written."
  25                 ask_bool 0 "Abort" && exit 1
  26                 return 0
  27         fi
  28 }
  29
  30 platform_copy_config() {
  31         local partdev
  32
  33         if export_partdevice partdev 1; then
  34                 mount -o rw,noatime "/dev/$partdev" /mnt
  35                 cp -af "$UPGRADE_BACKUP" "/mnt/$BACKUP_FILE"
  36                 umount /mnt
  37         fi
  38 }
  39
  40 platform_do_upgrade() {
  41         local diskdev partdev diff
  42
  43         export_bootdevice && export_partdevice diskdev 0 || {
  44                 echo "Unable to determine upgrade device"
  45                 return 1
  46         }
  47
  48         sync
  49
  50         if [ "$UPGRADE_OPT_SAVE_PARTITIONS" = "1" ]; then
  51                 get_partitions "/dev/$diskdev" bootdisk
  52
  53                 #extract the boot sector from the image
  54                 get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
  55
  56                 get_partitions /tmp/image.bs image
  57
  58                 #compare tables
  59                 diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
  60         else
  61                 diff=1
  62         fi
  63
  64         if [ -n "$diff" ]; then
  65                 get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
  66
  67                 # Separate removal and addtion is necessary; otherwise, partition 1
  68                 # will be missing if it overlaps with the old partition 2
  69                 partx -d - "/dev/$diskdev"
  70                 partx -a - "/dev/$diskdev"
  71
  72                 return 0
  73         fi
  74
  75         #iterate over each partition from the image and write it to the boot disk
  76         while read part start size; do
  77                 if export_partdevice partdev $part; then
  78                         echo "Writing image to /dev/$partdev..."
  79                         get_image "$@" | dd of="/dev/$partdev" ibs="512" obs=1M skip="$start" count="$size" conv=fsync
  80                 else
  81                         echo "Unable to find partition $part device, skipped."
  82                 fi
  83         done < /tmp/partmap.image
  84
  85         #copy partition uuid
  86         echo "Writing new UUID to /dev/$diskdev..."
  87         get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
  88 }