target/linux/sunxi/base-files/lib/upgrade/platform.sh

   1 platform_check_image() {
   2         true
   3 }
   4
   5 platform_copy_config() {
   6         local partdev
   7
   8         if export_partdevice partdev -1; then
   9                 mount -t vfat -o rw,noatime "/dev/$partdev" /mnt
  10                 cp -af "$CONF_TAR" /mnt/
  11                 umount /mnt
  12         fi
  13 }
  14
  15 platform_do_upgrade() {
  16         local diskdev partdev ibs diff
  17
  18         if export_bootdevice && export_partdevice diskdev -2; then
  19                 sync
  20                 if [ "$SAVE_PARTITIONS" = "1" ]; then
  21                         get_partitions "/dev/$diskdev" bootdisk
  22
  23                         #get block size
  24                         if [ -f "/sys/block/$diskdev/queue/physical_block_size" ]; then
  25                                 ibs="$(cat "/sys/block/$diskdev/queue/physical_block_size")"
  26                         else
  27                                 ibs=512
  28                         fi
  29
  30                         #extract the boot sector from the image
  31                         get_image "$@" | dd of=/tmp/image.bs count=1 bs=512b
  32
  33                         get_partitions /tmp/image.bs image
  34
  35                         #compare tables
  36                         diff="$(grep -F -x -v -f /tmp/partmap.bootdisk /tmp/partmap.image)"
  37                         if [ -n "$diff" ]; then
  38                                 echo "Partition layout is changed.  Full image will be written."
  39                                 ask_bool 0 "Abort" && exit
  40
  41                                 get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
  42                                 return 0
  43                         fi
  44
  45                         #write uboot image
  46                         get_image "$@" | dd of="$diskdev" bs=1024 skip=8 seek=8 conv=notrunc
  47                         #iterate over each partition from the image and write it to the boot disk
  48                         while read part start size; do
  49                                 part="$(($part - 2))"
  50                                 if export_partdevice partdev $part; then
  51                                         echo "Writing image to /dev/$partdev..."
  52                                         get_image "$@" | dd of="/dev/$partdev" ibs="$ibs" obs=1M skip="$start" count="$size" conv=fsync
  53                                 else
  54                                         echo "Unable to find partition $part device, skipped."
  55                                 fi
  56                         done < /tmp/partmap.image
  57
  58                         #copy partition uuid
  59                         echo "Writing new UUID to /dev/$diskdev..."
  60                         get_image "$@" | dd of="/dev/$diskdev" bs=1 skip=440 count=4 seek=440 conv=fsync
  61                 else
  62                         get_image "$@" | dd of="/dev/$diskdev" bs=4096 conv=fsync
  63                 fi
  64
  65                 sleep 1
  66         fi
  67 }